66309396 has 24 divisors (see below), whose sum is σ = 155529024. Its totient is φ = 21987840.

The previous prime is 66309371. The next prime is 66309409. The reversal of 66309396 is 69390366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12000 + ... + 16631.

It is an arithmetic number, because the mean of its divisors is an integer number (6480376).

Almost surely, 2^66309396 is an apocalyptic number.

It is an amenable number.

66309396 is an abundant number, since it is smaller than the sum of its proper divisors (89219628).

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

66309396 is a wasteful number, since it uses less digits than its factorization.

66309396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28831 (or 28829 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 42.

The square root of 66309396 is about 8143.0581478951. The cubic root of 66309396 is about 404.7545044741.

The spelling of 66309396 in words is "sixty-six million, three hundred nine thousand, three hundred ninety-six".