616665413 has 8 divisors (see below), whose sum is σ = 758972928. Its totient is φ = 487911024.

The previous prime is 616665407. The next prime is 616665457. The reversal of 616665413 is 314566616.

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

It is a cyclic number.

It is not a de Polignac number, because 616665413 - 2¹² = 616661317 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616665473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3388181 + ... + 3388362.

It is an arithmetic number, because the mean of its divisors is an integer number (94871616).

Almost surely, 2^616665413 is an apocalyptic number.

It is an amenable number.

616665413 is a deficient number, since it is larger than the sum of its proper divisors (142307515).

616665413 is a wasteful number, since it uses less digits than its factorization.

616665413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776563.

The product of its digits is 77760, while the sum is 38.

The square root of 616665413 is about 24832.7488007268. The cubic root of 616665413 is about 851.1704351118.

The spelling of 616665413 in words is "six hundred sixteen million, six hundred sixty-five thousand, four hundred thirteen".