664060251 has 8 divisors (see below), whose sum is σ = 885583440. Its totient is φ = 442621952.

The previous prime is 664060237. The next prime is 664060253. The reversal of 664060251 is 152060466.

664060251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664060251 - 2⁷ = 664060123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664060253) 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, 91 + ... + 36443.

It is an arithmetic number, because the mean of its divisors is an integer number (110697930).

Almost surely, 2^664060251 is an apocalyptic number.

664060251 is a deficient number, since it is larger than the sum of its proper divisors (221523189).

664060251 is a wasteful number, since it uses less digits than its factorization.

664060251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42445.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 664060251 is about 25769.3665230638. The cubic root of 664060251 is about 872.4405209547.

The spelling of 664060251 in words is "six hundred sixty-four million, sixty thousand, two hundred fifty-one".