667235057 has 8 divisors (see below), whose sum is σ = 709303392. Its totient is φ = 625480000.

The previous prime is 667235053. The next prime is 667235069. The reversal of 667235057 is 750532766.

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 667235057 - 2² = 667235053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667235053) 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, 73919 + ... + 82452.

It is an arithmetic number, because the mean of its divisors is an integer number (88662924).

Almost surely, 2^667235057 is an apocalyptic number.

It is an amenable number.

667235057 is a deficient number, since it is larger than the sum of its proper divisors (42068335).

667235057 is a wasteful number, since it uses less digits than its factorization.

667235057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156639.

The product of its (nonzero) digits is 264600, while the sum is 41.

The square root of 667235057 is about 25830.8934611252. The cubic root of 667235057 is about 873.8286615591.

The spelling of 667235057 in words is "six hundred sixty-seven million, two hundred thirty-five thousand, fifty-seven".