616164665 has 4 divisors (see below), whose sum is σ = 739397604. Its totient is φ = 492931728.

The previous prime is 616164631. The next prime is 616164727. The reversal of 616164665 is 566461616.

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 467251456 + 148913209 = 21616^2 + 12203^2 .

It is a cyclic number.

It is not a de Polignac number, because 616164665 - 2¹² = 616160569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61616462 + ... + 61616471.

It is an arithmetic number, because the mean of its divisors is an integer number (184849401).

Almost surely, 2^616164665 is an apocalyptic number.

It is an amenable number.

616164665 is a deficient number, since it is larger than the sum of its proper divisors (123232939).

616164665 is a wasteful number, since it uses less digits than its factorization.

616164665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123232938.

The product of its digits is 155520, while the sum is 41.

The square root of 616164665 is about 24822.6643412829. The cubic root of 616164665 is about 850.9399820418.

The spelling of 616164665 in words is "six hundred sixteen million, one hundred sixty-four thousand, six hundred sixty-five".