66397512 has 32 divisors (see below), whose sum is σ = 175759200. Its totient is φ = 20830464.

The previous prime is 66397453. The next prime is 66397531. The reversal of 66397512 is 21579366.

66397512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80962 + ... + 81777.

It is an arithmetic number, because the mean of its divisors is an integer number (5492475).

Almost surely, 2^66397512 is an apocalyptic number.

It is an amenable number.

66397512 is an abundant number, since it is smaller than the sum of its proper divisors (109361688).

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

66397512 is a wasteful number, since it uses less digits than its factorization.

66397512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162765 (or 162761 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 66397512 is about 8148.4668496595. The cubic root of 66397512 is about 404.9337126689.

The spelling of 66397512 in words is "sixty-six million, three hundred ninety-seven thousand, five hundred twelve".