16661652055650 has 72 divisors (see below), whose sum is σ = 51159205940544. Its totient is φ = 3808377612000.

The previous prime is 16661652055579. The next prime is 16661652055717. The reversal of 16661652055650 is 5655025616661.

It is a super-2 number, since 2×16661652055650² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2644703526 + ... + 2644709825.

It is an arithmetic number, because the mean of its divisors is an integer number (710544526952).

Almost surely, 2^{16661652055650} is an apocalyptic number.

16661652055650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16661652055650 is an abundant number, since it is smaller than the sum of its proper divisors (34497553884894).

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

16661652055650 is a wasteful number, since it uses less digits than its factorization.

16661652055650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289413376 (or 5289413368 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 54.

The spelling of 16661652055650 in words is "sixteen trillion, six hundred sixty-one billion, six hundred fifty-two million, fifty-five thousand, six hundred fifty".