664050961 has 16 divisors (see below), whose sum is σ = 788659200. Its totient is φ = 547057728.

The previous prime is 664050953. The next prime is 664050967. The reversal of 664050961 is 169050466.

It is not a de Polignac number, because 664050961 - 2³ = 664050953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664050961.

It is not an unprimeable number, because it can be changed into a prime (664050967) 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, 37935 + ... + 52603.

It is an arithmetic number, because the mean of its divisors is an integer number (49291200).

Almost surely, 2^664050961 is an apocalyptic number.

It is an amenable number.

664050961 is a deficient number, since it is larger than the sum of its proper divisors (124608239).

664050961 is a wasteful number, since it uses less digits than its factorization.

664050961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14928.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 664050961 is about 25769.1862696516. The cubic root of 664050961 is about 872.4364525437.

The spelling of 664050961 in words is "six hundred sixty-four million, fifty thousand, nine hundred sixty-one".