616656377 has 8 divisors (see below), whose sum is σ = 648734400. Its totient is φ = 585299344.

The previous prime is 616656373. The next prime is 616656379. The reversal of 616656377 is 773656616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 616656377 - 2² = 616656373 is a prime.

It is a super-2 number, since 2×616656377² = 760530174589532258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616656373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178493 + ... + 181914.

It is an arithmetic number, because the mean of its divisors is an integer number (81091800).

Almost surely, 2^616656377 is an apocalyptic number.

It is an amenable number.

616656377 is a deficient number, since it is larger than the sum of its proper divisors (32078023).

616656377 is a wasteful number, since it uses less digits than its factorization.

616656377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360495.

The product of its digits is 952560, while the sum is 47.

The square root of 616656377 is about 24832.5668628920. The cubic root of 616656377 is about 851.1662776906.

The spelling of 616656377 in words is "six hundred sixteen million, six hundred fifty-six thousand, three hundred seventy-seven".