102166731477 has 12 divisors (see below), whose sum is σ = 148398606720. Its totient is φ = 67730644008.

The previous prime is 102166731449. The next prime is 102166731493. The reversal of 102166731477 is 774137661201.

102166731477 is a `hidden beast` number, since 10 + 2 + 166 + 7 + 3 + 1 + 477 = 666.

It is not a de Polignac number, because 102166731477 - 2³⁰ = 101092989653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102166731977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31707493 + ... + 31710714.

It is an arithmetic number, because the mean of its divisors is an integer number (12366550560).

Almost surely, 2^102166731477 is an apocalyptic number.

It is an amenable number.

102166731477 is a deficient number, since it is larger than the sum of its proper divisors (46231875243).

102166731477 is a wasteful number, since it uses less digits than its factorization.

102166731477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63418392 (or 63418389 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 102166731477 in words is "one hundred two billion, one hundred sixty-six million, seven hundred thirty-one thousand, four hundred seventy-seven".