667694601 has 24 divisors (see below), whose sum is σ = 1167064704. Its totient is φ = 359095680.

The previous prime is 667694581. The next prime is 667694611. The reversal of 667694601 is 106496766.

It is a happy number.

It is not a de Polignac number, because 667694601 - 2²⁷ = 533476873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667694611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310645 + ... + 312786.

It is an arithmetic number, because the mean of its divisors is an integer number (48627696).

Almost surely, 2^667694601 is an apocalyptic number.

It is an amenable number.

667694601 is a deficient number, since it is larger than the sum of its proper divisors (499370103).

667694601 is a wasteful number, since it uses less digits than its factorization.

667694601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623461 (or 623458 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 667694601 is about 25839.7871701762. The cubic root of 667694601 is about 874.0292258431.

The spelling of 667694601 in words is "six hundred sixty-seven million, six hundred ninety-four thousand, six hundred one".