66515166 has 24 divisors (see below), whose sum is σ = 145547064. Its totient is φ = 21951600.

The previous prime is 66515123. The next prime is 66515167. The reversal of 66515166 is 66151566.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66515166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66515167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16476 + ... + 20111.

It is an arithmetic number, because the mean of its divisors is an integer number (6064461).

Almost surely, 2^66515166 is an apocalyptic number.

66515166 is an abundant number, since it is smaller than the sum of its proper divisors (79031898).

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

66515166 is a wasteful number, since it uses less digits than its factorization.

66515166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36696 (or 36693 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 66515166 is about 8155.6830492608. The cubic root of 66515166 is about 405.1727475226.

The spelling of 66515166 in words is "sixty-six million, five hundred fifteen thousand, one hundred sixty-six".