16616965 has 8 divisors (see below), whose sum is σ = 19973880. Its totient is φ = 13271232.

The previous prime is 16616947. The next prime is 16616983. The reversal of 16616965 is 56961661.

It is an interprime number because it is at equal distance from previous prime (16616947) and next prime (16616983).

It can be written as a sum of positive squares in 4 ways, for example, as 12152196 + 4464769 = 3486^2 + 2113^2 .

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 16616965 - 2⁵ = 16616933 is a prime.

It is a super-2 number, since 2×16616965² = 552247051622450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 931 + ... + 5839.

It is an arithmetic number, because the mean of its divisors is an integer number (2496735).

Almost surely, 2^16616965 is an apocalyptic number.

It is an amenable number.

16616965 is a deficient number, since it is larger than the sum of its proper divisors (3356915).

16616965 is an equidigital number, since it uses as much as digits as its factorization.

16616965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5591.

The product of its digits is 58320, while the sum is 40.

The square root of 16616965 is about 4076.3911735750. The cubic root of 16616965 is about 255.1823122750.

The spelling of 16616965 in words is "sixteen million, six hundred sixteen thousand, nine hundred sixty-five".