660523364 has 12 divisors (see below), whose sum is σ = 1156859004. Its totient is φ = 329992224.

The previous prime is 660523337. The next prime is 660523403. The reversal of 660523364 is 463325066.

It can be written as a sum of positive squares in 2 ways, for example, as 530380900 + 130142464 = 23030^2 + 11408^2 .

It is a super-2 number, since 2×660523364² = 872582228779752992, which contains 22 as substring.

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, 61799 + ... + 71694.

It is an arithmetic number, because the mean of its divisors is an integer number (96404917).

Almost surely, 2^660523364 is an apocalyptic number.

It is an amenable number.

660523364 is a deficient number, since it is larger than the sum of its proper divisors (496335640).

660523364 is a wasteful number, since it uses less digits than its factorization.

660523364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134734 (or 134732 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 660523364 is about 25700.6490968613. The cubic root of 660523364 is about 870.8888454121. Note that the first 4 decimals are identical.

The spelling of 660523364 in words is "six hundred sixty million, five hundred twenty-three thousand, three hundred sixty-four".