666369937 has 4 divisors (see below), whose sum is σ = 666422640. Its totient is φ = 666317236.

The previous prime is 666369931. The next prime is 666369959. The reversal of 666369937 is 739963666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 666369937 - 2³ = 666369929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666369931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5238 + ... + 36880.

It is an arithmetic number, because the mean of its divisors is an integer number (166605660).

Almost surely, 2^666369937 is an apocalyptic number.

It is an amenable number.

666369937 is a deficient number, since it is larger than the sum of its proper divisors (52703).

666369937 is a wasteful number, since it uses less digits than its factorization.

666369937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52702.

The product of its digits is 6613488, while the sum is 55.

The square root of 666369937 is about 25814.1421898927. The cubic root of 666369937 is about 873.4508368821.

The spelling of 666369937 in words is "six hundred sixty-six million, three hundred sixty-nine thousand, nine hundred thirty-seven".