1665083616 has 96 divisors (see below), whose sum is σ = 5089609728. Its totient is φ = 466752000.

The previous prime is 1665083611. The next prime is 1665083621. The reversal of 1665083616 is 6163805661.

It is an interprime number because it is at equal distance from previous prime (1665083611) and next prime (1665083621).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665083611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12241 + ... + 58991.

It is an arithmetic number, because the mean of its divisors is an integer number (53016768).

Almost surely, 2^1665083616 is an apocalyptic number.

1665083616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1665083616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2544804864).

1665083616 is an abundant number, since it is smaller than the sum of its proper divisors (3424526112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665083616 is a wasteful number, since it uses less digits than its factorization.

1665083616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46824 (or 46816 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1665083616 is about 40805.4361084403. The cubic root of 1665083616 is about 1185.2555997628.

The spelling of 1665083616 in words is "one billion, six hundred sixty-five million, eighty-three thousand, six hundred sixteen".