5665566654 has 64 divisors (see below), whose sum is σ = 13856417280. Its totient is φ = 1701624960.

The previous prime is 5665566631. The next prime is 5665566667. The reversal of 5665566654 is 4566655665.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 5665566654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24919 + ... + 109325.

It is an arithmetic number, because the mean of its divisors is an integer number (216506520).

Almost surely, 2^5665566654 is an apocalyptic number.

5665566654 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5665566654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6928208640).

5665566654 is an abundant number, since it is smaller than the sum of its proper divisors (8190850626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5665566654 is a wasteful number, since it uses less digits than its factorization.

5665566654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84542 (or 84536 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 54.

The square root of 5665566654 is about 75269.9585093548. The cubic root of 5665566654 is about 1782.7117122200.

The spelling of 5665566654 in words is "five billion, six hundred sixty-five million, five hundred sixty-six thousand, six hundred fifty-four".