660165616 has 40 divisors (see below), whose sum is σ = 1396946304. Its totient is φ = 299732160.

The previous prime is 660165601. The next prime is 660165629. The reversal of 660165616 is 616561066.

It is a super-3 number, since 3×660165616³ (a number of 27 digits) contains 333 as substring.

It is a congruent 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, 213715 + ... + 216781.

Almost surely, 2^660165616 is an apocalyptic number.

It is an amenable number.

660165616 is an abundant number, since it is smaller than the sum of its proper divisors (736780688).

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

660165616 is a wasteful number, since it uses less digits than its factorization.

660165616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309 (or 4303 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 660165616 is about 25693.6882521759. The cubic root of 660165616 is about 870.7315887958.

The spelling of 660165616 in words is "six hundred sixty million, one hundred sixty-five thousand, six hundred sixteen".