5655215666 has 8 divisors (see below), whose sum is σ = 8851641984. Its totient is φ = 2704668340.

The previous prime is 5655215663. The next prime is 5655215693. The reversal of 5655215666 is 6665125565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 5655215666.

It is not an unprimeable number, because it can be changed into a prime (5655215663) 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, 61469690 + ... + 61469781.

It is an arithmetic number, because the mean of its divisors is an integer number (1106455248).

Almost surely, 2^5655215666 is an apocalyptic number.

5655215666 is a deficient number, since it is larger than the sum of its proper divisors (3196426318).

5655215666 is a wasteful number, since it uses less digits than its factorization.

5655215666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122939496.

The product of its digits is 1620000, while the sum is 47.

The square root of 5655215666 is about 75201.1679829509. The cubic root of 5655215666 is about 1781.6253791806.

The spelling of 5655215666 in words is "five billion, six hundred fifty-five million, two hundred fifteen thousand, six hundred sixty-six".