1656600166656 has 72 divisors (see below), whose sum is σ = 4898858152160. Its totient is φ = 552200053248.

The previous prime is 1656600166619. The next prime is 1656600166673. The reversal of 1656600166656 is 6566610066561.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1656600166656² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119828170 + ... + 119841993.

Almost surely, 2^{1656600166656} is an apocalyptic number.

1656600166656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1656600166656 is an abundant number, since it is smaller than the sum of its proper divisors (3242257985504).

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

1656600166656 is an equidigital number, since it uses as much as digits as its factorization.

1656600166656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239670188 (or 239670168 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 1656600166656 in words is "one trillion, six hundred fifty-six billion, six hundred million, one hundred sixty-six thousand, six hundred fifty-six".