661480264 has 16 divisors (see below), whose sum is σ = 1248491520. Its totient is φ = 328549200.

The previous prime is 661480189. The next prime is 661480271. The reversal of 661480264 is 462084166.

661480264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×661480264² = 875112279323019392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272584 + ... + 274999.

It is an arithmetic number, because the mean of its divisors is an integer number (78030720).

Almost surely, 2^661480264 is an apocalyptic number.

It is an amenable number.

661480264 is a deficient number, since it is larger than the sum of its proper divisors (587011256).

661480264 is a wasteful number, since it uses less digits than its factorization.

661480264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547740 (or 547736 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 661480264 is about 25719.2586207301. The cubic root of 661480264 is about 871.3091946275.

The spelling of 661480264 in words is "six hundred sixty-one million, four hundred eighty thousand, two hundred sixty-four".