1665316536 has 96 divisors (see below), whose sum is σ = 4585248000. Its totient is φ = 503647872.

The previous prime is 1665316493. The next prime is 1665316537. The reversal of 1665316536 is 6356135661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665316537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235825 + ... + 242783.

It is an arithmetic number, because the mean of its divisors is an integer number (47763000).

Almost surely, 2^1665316536 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 1665316536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2292624000).

1665316536 is an abundant number, since it is smaller than the sum of its proper divisors (2919931464).

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

1665316536 is a wasteful number, since it uses less digits than its factorization.

1665316536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7053 (or 7036 counting only the distinct ones).

The product of its digits is 291600, while the sum is 42.

The square root of 1665316536 is about 40808.2900401377. The cubic root of 1665316536 is about 1185.3108636266.

The spelling of 1665316536 in words is "one billion, six hundred sixty-five million, three hundred sixteen thousand, five hundred thirty-six".