660531044 has 12 divisors (see below), whose sum is σ = 1180523904. Its totient is φ = 323238504.

The previous prime is 660531037. The next prime is 660531059. The reversal of 660531044 is 440135066.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 660530998 and 660531016.

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, 1756544 + ... + 1756919.

It is an arithmetic number, because the mean of its divisors is an integer number (98376992).

Almost surely, 2^660531044 is an apocalyptic number.

It is an amenable number.

660531044 is a deficient number, since it is larger than the sum of its proper divisors (519992860).

660531044 is a wasteful number, since it uses less digits than its factorization.

660531044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513514 (or 3513512 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 660531044 is about 25700.7985089958. The cubic root of 660531044 is about 870.8922207156.

The spelling of 660531044 in words is "six hundred sixty million, five hundred thirty-one thousand, forty-four".