5661622655 has 16 divisors (see below), whose sum is σ = 7319108160. Its totient is φ = 4179433728.

The previous prime is 5661622651. The next prime is 5661622691. The reversal of 5661622655 is 5562261665.

It is a cyclic number.

It is not a de Polignac number, because 5661622655 - 2² = 5661622651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661622651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195014 + ... + 222156.

It is an arithmetic number, because the mean of its divisors is an integer number (457444260).

Almost surely, 2^5661622655 is an apocalyptic number.

5661622655 is a deficient number, since it is larger than the sum of its proper divisors (1657485505).

5661622655 is a wasteful number, since it uses less digits than its factorization.

5661622655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30370.

The product of its digits is 648000, while the sum is 44.

The square root of 5661622655 is about 75243.7549235815. The cubic root of 5661622655 is about 1782.2979468792.

The spelling of 5661622655 in words is "five billion, six hundred sixty-one million, six hundred twenty-two thousand, six hundred fifty-five".