616166501 has 4 divisors (see below), whose sum is σ = 624607212. Its totient is φ = 607725792.

The previous prime is 616166489. The next prime is 616166539. The reversal of 616166501 is 105661616.

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 262764100 + 353402401 = 16210^2 + 18799^2 .

It is a cyclic number.

It is not a de Polignac number, because 616166501 - 2⁶ = 616166437 is a prime.

It is a super-2 number, since 2×616166501² = 759322313909166002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616166591) 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, 4220246 + ... + 4220391.

It is an arithmetic number, because the mean of its divisors is an integer number (156151803).

Almost surely, 2^616166501 is an apocalyptic number.

It is an amenable number.

616166501 is a deficient number, since it is larger than the sum of its proper divisors (8440711).

616166501 is an equidigital number, since it uses as much as digits as its factorization.

616166501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440710.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 616166501 is about 24822.7013235868. The cubic root of 616166501 is about 850.9408272294.

The spelling of 616166501 in words is "six hundred sixteen million, one hundred sixty-six thousand, five hundred one".