660849740 has 12 divisors (see below), whose sum is σ = 1387784496. Its totient is φ = 264339888.

The previous prime is 660849719. The next prime is 660849769. The reversal of 660849740 is 47948066.

It is a junction number, because it is equal to n+sod(n) for n = 660849691 and 660849700.

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, 16521224 + ... + 16521263.

It is an arithmetic number, because the mean of its divisors is an integer number (115648708).

Almost surely, 2^660849740 is an apocalyptic number.

It is an amenable number.

660849740 is an abundant number, since it is smaller than the sum of its proper divisors (726934756).

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

660849740 is a wasteful number, since it uses less digits than its factorization.

660849740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33042496 (or 33042494 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 660849740 is about 25706.9978799548. The cubic root of 660849740 is about 871.0322621988.

The spelling of 660849740 in words is "six hundred sixty million, eight hundred forty-nine thousand, seven hundred forty".