66225977 has 8 divisors (see below), whose sum is σ = 67973664. Its totient is φ = 64487808.

The previous prime is 66225959. The next prime is 66225979. The reversal of 66225977 is 77952266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66225977 - 2⁸ = 66225721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66225979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12998 + ... + 17360.

It is an arithmetic number, because the mean of its divisors is an integer number (8496708).

Almost surely, 2^66225977 is an apocalyptic number.

It is an amenable number.

66225977 is a deficient number, since it is larger than the sum of its proper divisors (1747687).

66225977 is a wasteful number, since it uses less digits than its factorization.

66225977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759.

The product of its digits is 317520, while the sum is 44.

The square root of 66225977 is about 8137.9344430881. The cubic root of 66225977 is about 404.5847025722.

The spelling of 66225977 in words is "sixty-six million, two hundred twenty-five thousand, nine hundred seventy-seven".