660415060 has 12 divisors (see below), whose sum is σ = 1386871668. Its totient is φ = 264166016.

The previous prime is 660415043. The next prime is 660415061. The reversal of 660415060 is 60514066.

It can be written as a sum of positive squares in 2 ways, for example, as 496933264 + 163481796 = 22292^2 + 12786^2 .

It is a super-2 number, since 2×660415060² = 872296102949607200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660415061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16510357 + ... + 16510396.

It is an arithmetic number, because the mean of its divisors is an integer number (115572639).

Almost surely, 2^660415060 is an apocalyptic number.

It is an amenable number.

660415060 is an abundant number, since it is smaller than the sum of its proper divisors (726456608).

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

660415060 is a wasteful number, since it uses less digits than its factorization.

660415060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33020762 (or 33020760 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 660415060 is about 25698.5419819880. The cubic root of 660415060 is about 870.8412438150.

The spelling of 660415060 in words is "six hundred sixty million, four hundred fifteen thousand, sixty".