616965660 has 60 divisors (see below), whose sum is σ = 1935449208. Its totient is φ = 164523744.

The previous prime is 616965637. The next prime is 616965667. The reversal of 616965660 is 66569616.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616965667) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 188802 + ... + 192041.

Almost surely, 2^616965660 is an apocalyptic number.

616965660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

616965660 is an abundant number, since it is smaller than the sum of its proper divisors (1318483548).

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

616965660 is a wasteful number, since it uses less digits than its factorization.

616965660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380864 (or 380853 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 616965660 is about 24838.7934489580. The cubic root of 616965660 is about 851.3085542597.

The spelling of 616965660 in words is "six hundred sixteen million, nine hundred sixty-five thousand, six hundred sixty".