210664057 has 8 divisors (see below), whose sum is σ = 213801984. Its totient is φ = 207533088.

The previous prime is 210664037. The next prime is 210664063. The reversal of 210664057 is 750466012.

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 a de Polignac number, because none of the positive numbers 2^k-210664057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210664037) 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, 114648 + ... + 116470.

It is an arithmetic number, because the mean of its divisors is an integer number (26725248).

Almost surely, 2^210664057 is an apocalyptic number.

It is an amenable number.

210664057 is a deficient number, since it is larger than the sum of its proper divisors (3137927).

210664057 is a wasteful number, since it uses less digits than its factorization.

210664057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 210664057 is about 14514.2708049698. The cubic root of 210664057 is about 595.0180603232.

The spelling of 210664057 in words is "two hundred ten million, six hundred sixty-four thousand, fifty-seven".