664949466 has 32 divisors (see below), whose sum is σ = 1485190080. Its totient is φ = 220521168.

The previous prime is 664949449. The next prime is 664949513.

664949466 is a `hidden beast` number, since 6 + 6 + 494 + 94 + 66 = 666.

664949466 is nontrivially palindromic in base 10.

664949466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20616 + ... + 41891.

It is an arithmetic number, because the mean of its divisors is an integer number (46412190).

Almost surely, 2^664949466 is an apocalyptic number.

664949466 is an abundant number, since it is smaller than the sum of its proper divisors (820240614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664949466 is a wasteful number, since it uses less digits than its factorization.

664949466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62715 (or 62709 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The square root of 664949466 is about 25786.6140856065. The cubic root of 664949466 is about 872.8297633362.

The spelling of 664949466 in words is "six hundred sixty-four million, nine hundred forty-nine thousand, four hundred sixty-six".