667057601 has 16 divisors (see below), whose sum is σ = 768537984. Its totient is φ = 567143424.

The previous prime is 667057579. The next prime is 667057603. The reversal of 667057601 is 106750766.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667057601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667057603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760175 + ... + 761051.

It is an arithmetic number, because the mean of its divisors is an integer number (48033624).

Almost surely, 2^667057601 is an apocalyptic number.

It is an amenable number.

667057601 is a deficient number, since it is larger than the sum of its proper divisors (101480383).

667057601 is a wasteful number, since it uses less digits than its factorization.

667057601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 667057601 is about 25827.4582760286. The cubic root of 667057601 is about 873.7511876682.

The spelling of 667057601 in words is "six hundred sixty-seven million, fifty-seven thousand, six hundred one".