166890157775 has 24 divisors (see below), whose sum is σ = 225865714800. Its totient is φ = 121316140800.

The previous prime is 166890157769. The next prime is 166890157793. The reversal of 166890157775 is 577751098661.

It is not a de Polignac number, because 166890157775 - 2²² = 166885963471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 429221 + ... + 719729.

It is an arithmetic number, because the mean of its divisors is an integer number (9411071450).

Almost surely, 2^166890157775 is an apocalyptic number.

166890157775 is a deficient number, since it is larger than the sum of its proper divisors (58975557025).

166890157775 is a wasteful number, since it uses less digits than its factorization.

166890157775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292619 (or 292614 counting only the distinct ones).

The product of its (nonzero) digits is 22226400, while the sum is 62.

The spelling of 166890157775 in words is "one hundred sixty-six billion, eight hundred ninety million, one hundred fifty-seven thousand, seven hundred seventy-five".