661163832132 has 48 divisors (see below), whose sum is σ = 1638282125760. Its totient is φ = 206940883968.

The previous prime is 661163832107. The next prime is 661163832169. The reversal of 661163832132 is 231238361166.

It is a super-2 number, since 2×661163832132² (a number of 24 digits) contains 22 as substring.

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, 12805393 + ... + 12856920.

It is an arithmetic number, because the mean of its divisors is an integer number (34130877620).

Almost surely, 2^661163832132 is an apocalyptic number.

It is an amenable number.

661163832132 is an abundant number, since it is smaller than the sum of its proper divisors (977118293628).

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

661163832132 is a wasteful number, since it uses less digits than its factorization.

661163832132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25662452 (or 25662450 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The spelling of 661163832132 in words is "six hundred sixty-one billion, one hundred sixty-three million, eight hundred thirty-two thousand, one hundred thirty-two".