2616055661 has 4 divisors (see below), whose sum is σ = 2618545824. Its totient is φ = 2613565500.

The previous prime is 2616055649. The next prime is 2616055681. The reversal of 2616055661 is 1665506162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2616055661 - 2¹⁴ = 2616039277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2616055681) 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, 1243505 + ... + 1245606.

It is an arithmetic number, because the mean of its divisors is an integer number (654636456).

Almost surely, 2^2616055661 is an apocalyptic number.

It is an amenable number.

2616055661 is a deficient number, since it is larger than the sum of its proper divisors (2490163).

2616055661 is a wasteful number, since it uses less digits than its factorization.

2616055661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490162.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 2616055661 is about 51147.3915366170. The cubic root of 2616055661 is about 1377.8935273098.

The spelling of 2616055661 in words is "two billion, six hundred sixteen million, fifty-five thousand, six hundred sixty-one".