166632615411554 has 4 divisors (see below), whose sum is σ = 249948923117334. Its totient is φ = 83316307705776.

The previous prime is 166632615411527. The next prime is 166632615411599. The reversal of 166632615411554 is 455114516236661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 163585967345329 + 3046648066225 = 12790073^2 + 1745465^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166632615411554.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41658153852887 + ... + 41658153852890.

Almost surely, 2^{166632615411554} is an apocalyptic number.

166632615411554 is a deficient number, since it is larger than the sum of its proper divisors (83316307705780).

166632615411554 is an equidigital number, since it uses as much as digits as its factorization.

166632615411554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83316307705779.

The product of its digits is 15552000, while the sum is 56.

The spelling of 166632615411554 in words is "one hundred sixty-six trillion, six hundred thirty-two billion, six hundred fifteen million, four hundred eleven thousand, five hundred fifty-four".