56666754077747 has 32 divisors (see below), whose sum is σ = 62521321374720. Its totient is φ = 50931070945920.

The previous prime is 56666754077743. The next prime is 56666754077777. The reversal of 56666754077747 is 74777045766665.

It is not a de Polignac number, because 56666754077747 - 2² = 56666754077743 is a prime.

It is a super-2 number, since 2×56666754077747² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56666754077743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2079271373 + ... + 2079298625.

It is an arithmetic number, because the mean of its divisors is an integer number (1953791292960).

Almost surely, 2^{56666754077747} is an apocalyptic number.

56666754077747 is a deficient number, since it is larger than the sum of its proper divisors (5854567296973).

56666754077747 is a wasteful number, since it uses less digits than its factorization.

56666754077747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30323.

The product of its (nonzero) digits is 8712748800, while the sum is 77.

The spelling of 56666754077747 in words is "fifty-six trillion, six hundred sixty-six billion, seven hundred fifty-four million, seventy-seven thousand, seven hundred forty-seven".