56666601550605 has 16 divisors (see below), whose sum is σ = 91513913534784. Its totient is φ = 29939737142400.

The previous prime is 56666601550589. The next prime is 56666601550613. The reversal of 56666601550605 is 50605510666665.

It is not a de Polignac number, because 56666601550605 - 2⁴ = 56666601550589 is a prime.

It is a super-2 number, since 2×56666601550605² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17653145296 + ... + 17653148505.

It is an arithmetic number, because the mean of its divisors is an integer number (5719619595924).

Almost surely, 2^{56666601550605} is an apocalyptic number.

It is an amenable number.

56666601550605 is a deficient number, since it is larger than the sum of its proper divisors (34847311984179).

56666601550605 is a wasteful number, since it uses less digits than its factorization.

56666601550605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35306293916.

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 56666601550605 in words is "fifty-six trillion, six hundred sixty-six billion, six hundred one million, five hundred fifty thousand, six hundred five".