166427766 has 12 divisors (see below), whose sum is σ = 360593532. Its totient is φ = 55475916.

The previous prime is 166427761. The next prime is 166427777. The reversal of 166427766 is 667724661.

It is a happy number.

166427766 is a `hidden beast` number, since 166 + 427 + 7 + 66 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166427761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4622976 + ... + 4623011.

It is an arithmetic number, because the mean of its divisors is an integer number (30049461).

Almost surely, 2^166427766 is an apocalyptic number.

166427766 is an abundant number, since it is smaller than the sum of its proper divisors (194165766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166427766 is a wasteful number, since it uses less digits than its factorization.

166427766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245995 (or 9245992 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 166427766 is about 12900.6885862732. The cubic root of 166427766 is about 550.0581382069.

The spelling of 166427766 in words is "one hundred sixty-six million, four hundred twenty-seven thousand, seven hundred sixty-six".