166437274153257 has 24 divisors (see below), whose sum is σ = 241017600749640. Its totient is φ = 110677479010560.

The previous prime is 166437274153253. The next prime is 166437274153289. The reversal of 166437274153257 is 752351472734661.

It is a happy number.

166437274153257 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 3 + 7 + 2 + 7 + 41 + 532 + 57 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6876646096896 + 159560628056361 = 2622336^2 + 12631731^2 .

It is not a de Polignac number, because 166437274153257 - 2² = 166437274153253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166437274153194 and 166437274153203.

It is not an unprimeable number, because it can be changed into a prime (166437274153253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 425452407 + ... + 425843427.

It is an arithmetic number, because the mean of its divisors is an integer number (10042400031235).

Almost surely, 2^{166437274153257} is an apocalyptic number.

It is an amenable number.

166437274153257 is a deficient number, since it is larger than the sum of its proper divisors (74580326596383).

166437274153257 is a wasteful number, since it uses less digits than its factorization.

166437274153257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510553 (or 510550 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 63.

The spelling of 166437274153257 in words is "one hundred sixty-six trillion, four hundred thirty-seven billion, two hundred seventy-four million, one hundred fifty-three thousand, two hundred fifty-seven".