660231740 has 48 divisors (see below), whose sum is σ = 1586085312. Its totient is φ = 226146816.

The previous prime is 660231727. The next prime is 660231773. The reversal of 660231740 is 47132066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222104 + ... + 225056.

It is an arithmetic number, because the mean of its divisors is an integer number (33043444).

Almost surely, 2^660231740 is an apocalyptic number.

It is an amenable number.

660231740 is an abundant number, since it is smaller than the sum of its proper divisors (925853572).

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

660231740 is a wasteful number, since it uses less digits than its factorization.

660231740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566 (or 4564 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 660231740 is about 25694.9749951231. The cubic root of 660231740 is about 870.7606594471.

The spelling of 660231740 in words is "six hundred sixty million, two hundred thirty-one thousand, seven hundred forty".