660061328 has 40 divisors (see below), whose sum is σ = 1304717088. Its totient is φ = 323419392.

The previous prime is 660061313. The next prime is 660061399. The reversal of 660061328 is 823160066.

It is a super-2 number, since 2×660061328² = 871361913442247168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660061294 and 660061303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188651 + ... + 192117.

Almost surely, 2^660061328 is an apocalyptic number.

It is an amenable number.

660061328 is a deficient number, since it is larger than the sum of its proper divisors (644655760).

660061328 is a wasteful number, since it uses less digits than its factorization.

660061328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711 (or 3705 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 660061328 is about 25691.6587241852. The cubic root of 660061328 is about 870.6857358382.

The spelling of 660061328 in words is "six hundred sixty million, sixty-one thousand, three hundred twenty-eight".