666377495 has 16 divisors (see below), whose sum is σ = 922278720. Its totient is φ = 452749824.

The previous prime is 666377483. The next prime is 666377501. The reversal of 666377495 is 594773666.

It is a cyclic number.

It is not a de Polignac number, because 666377495 - 2²⁰ = 665328919 is a prime.

It is a congruent number.

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, 83522 + ... + 91151.

It is an arithmetic number, because the mean of its divisors is an integer number (57642420).

Almost surely, 2^666377495 is an apocalyptic number.

666377495 is a deficient number, since it is larger than the sum of its proper divisors (255901225).

666377495 is a wasteful number, since it uses less digits than its factorization.

666377495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174794.

The product of its digits is 5715360, while the sum is 53.

The square root of 666377495 is about 25814.2885821012. The cubic root of 666377495 is about 873.4541391102.

The spelling of 666377495 in words is "six hundred sixty-six million, three hundred seventy-seven thousand, four hundred ninety-five".