616661799 has 16 divisors (see below), whose sum is σ = 886053504. Its totient is φ = 379231200.

The previous prime is 616661779. The next prime is 616661807. The reversal of 616661799 is 997166616.

It is not a de Polignac number, because 616661799 - 2⁸ = 616661543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616661729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66264 + ... + 74994.

It is an arithmetic number, because the mean of its divisors is an integer number (55378344).

Almost surely, 2^616661799 is an apocalyptic number.

616661799 is a deficient number, since it is larger than the sum of its proper divisors (269391705).

616661799 is a wasteful number, since it uses less digits than its factorization.

616661799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10558.

The product of its digits is 734832, while the sum is 51.

The square root of 616661799 is about 24832.6760338067. The cubic root of 616661799 is about 851.1687723322.

The spelling of 616661799 in words is "six hundred sixteen million, six hundred sixty-one thousand, seven hundred ninety-nine".