667207057 has 8 divisors (see below), whose sum is σ = 728460000. Its totient is φ = 606053760.

The previous prime is 667207043. The next prime is 667207127. The reversal of 667207057 is 750702766.

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 667207057 - 2⁷ = 667206929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667207027) 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, 10543 + ... + 38020.

It is an arithmetic number, because the mean of its divisors is an integer number (91057500).

Almost surely, 2^667207057 is an apocalyptic number.

It is an amenable number.

667207057 is a deficient number, since it is larger than the sum of its proper divisors (61252943).

667207057 is a wasteful number, since it uses less digits than its factorization.

667207057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49823.

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 667207057 is about 25830.3514687664. The cubic root of 667207057 is about 873.8164382082.

The spelling of 667207057 in words is "six hundred sixty-seven million, two hundred seven thousand, fifty-seven".