66165396 has 48 divisors (see below), whose sum is σ = 168956928. Its totient is φ = 19986400.

The previous prime is 66165389. The next prime is 66165409. The reversal of 66165396 is 69356166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56311 + ... + 57473.

It is an arithmetic number, because the mean of its divisors is an integer number (3519936).

Almost surely, 2^66165396 is an apocalyptic number.

66165396 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66165396 is an abundant number, since it is smaller than the sum of its proper divisors (102791532).

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

66165396 is a wasteful number, since it uses less digits than its factorization.

66165396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1610 counting only the distinct ones).

The product of its digits is 174960, while the sum is 42.

The square root of 66165396 is about 8134.2114553287. The cubic root of 66165396 is about 404.4612987135.

The spelling of 66165396 in words is "sixty-six million, one hundred sixty-five thousand, three hundred ninety-six".