665390627 has 8 divisors (see below), whose sum is σ = 726785472. Its totient is φ = 604146600.

The previous prime is 665390617. The next prime is 665390639. The reversal of 665390627 is 726093566.

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 665390627 - 2⁶ = 665390563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665390617) 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, 28373 + ... + 46214.

It is an arithmetic number, because the mean of its divisors is an integer number (90848184).

Almost surely, 2^665390627 is an apocalyptic number.

665390627 is a deficient number, since it is larger than the sum of its proper divisors (61394845).

665390627 is a wasteful number, since it uses less digits than its factorization.

665390627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75409.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 665390627 is about 25795.1667372010. The cubic root of 665390627 is about 873.0227470874.

The spelling of 665390627 in words is "six hundred sixty-five million, three hundred ninety thousand, six hundred twenty-seven".