660398496 has 48 divisors (see below), whose sum is σ = 1780408224. Its totient is φ = 214182144.

The previous prime is 660398489. The next prime is 660398503. The reversal of 660398496 is 694893066.

It is an interprime number because it is at equal distance from previous prime (660398489) and next prime (660398503).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×660398496² = 872252347038124032, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 89410 + ... + 96513.

It is an arithmetic number, because the mean of its divisors is an integer number (37091838).

Almost surely, 2^660398496 is an apocalyptic number.

It is an amenable number.

660398496 is an abundant number, since it is smaller than the sum of its proper divisors (1120009728).

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

660398496 is a wasteful number, since it uses less digits than its factorization.

660398496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185973 (or 185965 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The square root of 660398496 is about 25698.2197048745. The cubic root of 660398496 is about 870.8339631740.

The spelling of 660398496 in words is "six hundred sixty million, three hundred ninety-eight thousand, four hundred ninety-six".