166800513623275 has 144 divisors (see below), whose sum is σ = 253891813979136. Its totient is φ = 106448511882240.

The previous prime is 166800513623251. The next prime is 166800513623287. The reversal of 166800513623275 is 572326315008661.

It is not a de Polignac number, because 166800513623275 - 2³³ = 166791923688683 is a prime.

It is a super-2 number, since 2×166800513623275² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1553356387 + ... + 1553463763.

Almost surely, 2^{166800513623275} is an apocalyptic number.

166800513623275 is a deficient number, since it is larger than the sum of its proper divisors (87091300355861).

166800513623275 is a wasteful number, since it uses less digits than its factorization.

166800513623275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107866 (or 107842 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 166800513623275 in words is "one hundred sixty-six trillion, eight hundred billion, five hundred thirteen million, six hundred twenty-three thousand, two hundred seventy-five".