664982460 has 120 divisors (see below), whose sum is σ = 2092604976. Its totient is φ = 176774400.

The previous prime is 664982443. The next prime is 664982497. The reversal of 664982460 is 64289466.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 973279 + ... + 973961.

Almost surely, 2^664982460 is an apocalyptic number.

664982460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664982460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046302488).

664982460 is an abundant number, since it is smaller than the sum of its proper divisors (1427622516).

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

664982460 is a wasteful number, since it uses less digits than its factorization.

664982460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 664982460 is about 25787.2538281997. The cubic root of 664982460 is about 872.8441993550.

The spelling of 664982460 in words is "six hundred sixty-four million, nine hundred eighty-two thousand, four hundred sixty".