660860490 has 32 divisors (see below), whose sum is σ = 1586765376. Its totient is φ = 176151680.

The previous prime is 660860477. The next prime is 660860491. The reversal of 660860490 is 94068066.

It is not an unprimeable number, because it can be changed into a prime (660860491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104725 + ... + 110855.

It is an arithmetic number, because the mean of its divisors is an integer number (49586418).

Almost surely, 2^660860490 is an apocalyptic number.

660860490 is an abundant number, since it is smaller than the sum of its proper divisors (925904886).

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

660860490 is a wasteful number, since it uses less digits than its factorization.

660860490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9734.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 660860490 is about 25707.2069661408. The cubic root of 660860490 is about 871.0369851817.

The spelling of 660860490 in words is "six hundred sixty million, eight hundred sixty thousand, four hundred ninety".