660344402 has 16 divisors (see below), whose sum is σ = 1034536320. Its totient is φ = 315801648.

The previous prime is 660344393. The next prime is 660344441. The reversal of 660344402 is 204443066.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71258 + ... + 79989.

It is an arithmetic number, because the mean of its divisors is an integer number (64658520).

Almost surely, 2^660344402 is an apocalyptic number.

660344402 is a deficient number, since it is larger than the sum of its proper divisors (374191918).

660344402 is a wasteful number, since it uses less digits than its factorization.

660344402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151345.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 660344402 is about 25697.1671979617. The cubic root of 660344402 is about 870.8101855211.

Adding to 660344402 its reverse (204443066), we get a palindrome (864787468).

The spelling of 660344402 in words is "six hundred sixty million, three hundred forty-four thousand, four hundred two".