616660601 has 4 divisors (see below), whose sum is σ = 652934772. Its totient is φ = 580386432.

The previous prime is 616660579. The next prime is 616660621. The reversal of 616660601 is 106066616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 553378576 + 63282025 = 23524^2 + 7955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616660601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616660621) 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, 18137060 + ... + 18137093.

It is an arithmetic number, because the mean of its divisors is an integer number (163233693).

Almost surely, 2^616660601 is an apocalyptic number.

It is an amenable number.

616660601 is a deficient number, since it is larger than the sum of its proper divisors (36274171).

616660601 is a wasteful number, since it uses less digits than its factorization.

616660601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36274170.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 616660601 is about 24832.6519123512. The cubic root of 616660601 is about 851.1682211382.

The spelling of 616660601 in words is "six hundred sixteen million, six hundred sixty thousand, six hundred one".