665872927 has 2 divisors, whose sum is σ = 665872928. Its totient is φ = 665872926.

The previous prime is 665872919. The next prime is 665872937. The reversal of 665872927 is 729278566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665872927 - 2³ = 665872919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665872937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332936463 + 332936464.

It is an arithmetic number, because the mean of its divisors is an integer number (332936464).

Almost surely, 2^665872927 is an apocalyptic number.

665872927 is a deficient number, since it is larger than the sum of its proper divisors (1).

665872927 is an equidigital number, since it uses as much as digits as its factorization.

665872927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 52.

The square root of 665872927 is about 25804.5136943132. The cubic root of 665872927 is about 873.2336293179.

The spelling of 665872927 in words is "six hundred sixty-five million, eight hundred seventy-two thousand, nine hundred twenty-seven".