16661732345320 has 32 divisors (see below), whose sum is σ = 38002444328520. Its totient is φ = 6573395773440.

The previous prime is 16661732345231. The next prime is 16661732345341. The reversal of 16661732345320 is 2354323716661.

It can be written as a sum of positive squares in 4 ways, for example, as 16593516308196 + 68216037124 = 4073514^2 + 261182^2 .

It is a super-2 number, since 2×16661732345320² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2853033441 + ... + 2853039280.

Almost surely, 2^{16661732345320} is an apocalyptic number.

16661732345320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16661732345320 is an abundant number, since it is smaller than the sum of its proper divisors (21340711983200).

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

16661732345320 is a wasteful number, since it uses less digits than its factorization.

16661732345320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5706072805 (or 5706072801 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 16661732345320 in words is "sixteen trillion, six hundred sixty-one billion, seven hundred thirty-two million, three hundred forty-five thousand, three hundred twenty".