166577827616 has 12 divisors (see below), whose sum is σ = 327950098182. Its totient is φ = 83288913792.

The previous prime is 166577827567. The next prime is 166577827621. The reversal of 166577827616 is 616728775661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 124143475600 + 42434352016 = 352340^2 + 205996^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2602778525 + ... + 2602778588.

Almost surely, 2^166577827616 is an apocalyptic number.

166577827616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166577827616 is a deficient number, since it is larger than the sum of its proper divisors (161372270566).

166577827616 is an equidigital number, since it uses as much as digits as its factorization.

166577827616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205557123 (or 5205557115 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 62.

The spelling of 166577827616 in words is "one hundred sixty-six billion, five hundred seventy-seven million, eight hundred twenty-seven thousand, six hundred sixteen".