2616321566 has 4 divisors (see below), whose sum is σ = 3924482352. Its totient is φ = 1308160782.

The previous prime is 2616321563. The next prime is 2616321569. The reversal of 2616321566 is 6651236162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2616321563) and next prime (2616321569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2616321563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654080390 + ... + 654080393.

It is an arithmetic number, because the mean of its divisors is an integer number (981120588).

Almost surely, 2^2616321566 is an apocalyptic number.

2616321566 is a deficient number, since it is larger than the sum of its proper divisors (1308160786).

2616321566 is a wasteful number, since it uses less digits than its factorization.

2616321566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308160785.

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

The square root of 2616321566 is about 51149.9908699894. The cubic root of 2616321566 is about 1377.9402103590.

The spelling of 2616321566 in words is "two billion, six hundred sixteen million, three hundred twenty-one thousand, five hundred sixty-six".