66872995 has 16 divisors (see below), whose sum is σ = 93585600. Its totient is φ = 45854592.

The previous prime is 66872987. The next prime is 66873013. The reversal of 66872995 is 59927866.

It is a happy number.

It is not a de Polignac number, because 66872995 - 2³ = 66872987 is a prime.

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, 17782 + ... + 21211.

It is an arithmetic number, because the mean of its divisors is an integer number (5849100).

Almost surely, 2^66872995 is an apocalyptic number.

66872995 is a deficient number, since it is larger than the sum of its proper divisors (26712605).

66872995 is an equidigital number, since it uses as much as digits as its factorization.

66872995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39019 (or 39005 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 52.

The square root of 66872995 is about 8177.5910267022. The cubic root of 66872995 is about 405.8980124327.

The spelling of 66872995 in words is "sixty-six million, eight hundred seventy-two thousand, nine hundred ninety-five".