1661713248 has 96 divisors (see below), whose sum is σ = 4944844800. Its totient is φ = 484379136.

The previous prime is 1661713237. The next prime is 1661713301. The reversal of 1661713248 is 8423171661.

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

It is a super-2 number, since 2×1661713248² = 5522581837157419008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11328 + ... + 58751.

It is an arithmetic number, because the mean of its divisors is an integer number (51508800).

Almost surely, 2^1661713248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1661713248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472422400).

1661713248 is an abundant number, since it is smaller than the sum of its proper divisors (3283131552).

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

1661713248 is a wasteful number, since it uses less digits than its factorization.

1661713248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70124 (or 70116 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 1661713248 is about 40764.1171620336. The cubic root of 1661713248 is about 1184.4553504829.

The spelling of 1661713248 in words is "one billion, six hundred sixty-one million, seven hundred thirteen thousand, two hundred forty-eight".