66877825 has 24 divisors (see below), whose sum is σ = 95208192. Its totient is φ = 45649920.

The previous prime is 66877817. The next prime is 66877841. The reversal of 66877825 is 52877866.

It is not a de Polignac number, because 66877825 - 2³ = 66877817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44232 + ... + 45718.

It is an arithmetic number, because the mean of its divisors is an integer number (3967008).

Almost surely, 2^66877825 is an apocalyptic number.

It is an amenable number.

66877825 is a deficient number, since it is larger than the sum of its proper divisors (28330367).

66877825 is a wasteful number, since it uses less digits than its factorization.

66877825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1756 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 66877825 is about 8177.8863406139. The cubic root of 66877825 is about 405.9077843903.

The spelling of 66877825 in words is "sixty-six million, eight hundred seventy-seven thousand, eight hundred twenty-five".