660963960 has 48 divisors (see below), whose sum is σ = 2148134040. Its totient is φ = 176256960.

The previous prime is 660963937. The next prime is 660963983. The reversal of 660963960 is 69369066.

660963960 is a `hidden beast` number, since 6 + 6 + 0 + 9 + 639 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (660963937) and next prime (660963983).

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 917646 + ... + 918365.

Almost surely, 2^660963960 is an apocalyptic number.

660963960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660963960 is an abundant number, since it is smaller than the sum of its proper divisors (1487170080).

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

660963960 is a wasteful number, since it uses less digits than its factorization.

660963960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836028 (or 1836021 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 660963960 is about 25709.2193580435. The cubic root of 660963960 is about 871.0824418224.

The spelling of 660963960 in words is "six hundred sixty million, nine hundred sixty-three thousand, nine hundred sixty".