666750707 has 8 divisors (see below), whose sum is σ = 762300000. Its totient is φ = 571276224.

The previous prime is 666750691. The next prime is 666750739. The reversal of 666750707 is 707057666.

It is a happy number.

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 666750707 - 2⁴ = 666750691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666750787) 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, 1919 + ... + 36567.

It is an arithmetic number, because the mean of its divisors is an integer number (95287500).

Almost surely, 2^666750707 is an apocalyptic number.

666750707 is a deficient number, since it is larger than the sum of its proper divisors (95549293).

666750707 is a wasteful number, since it uses less digits than its factorization.

666750707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37405.

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 666750707 is about 25821.5163574876. The cubic root of 666750707 is about 873.6171711907.

The spelling of 666750707 in words is "six hundred sixty-six million, seven hundred fifty thousand, seven hundred seven".