666359207 has 4 divisors (see below), whose sum is σ = 666411456. Its totient is φ = 666306960.

The previous prime is 666359201. The next prime is 666359209. The reversal of 666359207 is 702953666.

It is a semiprime because it is the product of two primes, 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 666359207 - 2⁶ = 666359143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666359201) 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, 7043 + ... + 37179.

It is an arithmetic number, because the mean of its divisors is an integer number (166602864).

Almost surely, 2^666359207 is an apocalyptic number.

666359207 is a deficient number, since it is larger than the sum of its proper divisors (52249).

666359207 is a wasteful number, since it uses less digits than its factorization.

666359207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52248.

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

The square root of 666359207 is about 25813.9343572420. The cubic root of 666359207 is about 873.4461487066.

The spelling of 666359207 in words is "six hundred sixty-six million, three hundred fifty-nine thousand, two hundred seven".