660417402 has 16 divisors (see below), whose sum is σ = 1321535232. Its totient is φ = 220022400.

The previous prime is 660417383. The next prime is 660417413. The reversal of 660417402 is 204714066.

It is a super-2 number, since 2×660417402² = 872302289728859208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660417402.

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, 16503 + ... + 39914.

It is an arithmetic number, because the mean of its divisors is an integer number (82595952).

Almost surely, 2^660417402 is an apocalyptic number.

660417402 is an abundant number, since it is smaller than the sum of its proper divisors (661117830).

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

660417402 is a wasteful number, since it uses less digits than its factorization.

660417402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58373.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 660417402 is about 25698.5875487350. The cubic root of 660417402 is about 870.8422732221.

The spelling of 660417402 in words is "six hundred sixty million, four hundred seventeen thousand, four hundred two".