56673180661 has 16 divisors (see below), whose sum is σ = 59221465200. Its totient is φ = 54167113728.

The previous prime is 56673180643. The next prime is 56673180671. The reversal of 56673180661 is 16608137665.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9958842436 + 46714338225 = 99794^2 + 216135^2 .

It is a cyclic number.

It is not a de Polignac number, because 56673180661 - 2⁷ = 56673180533 is a prime.

It is a super-3 number, since 3×56673180661³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56673180611) 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, 1201621 + ... + 1247893.

It is an arithmetic number, because the mean of its divisors is an integer number (3701341575).

Almost surely, 2^56673180661 is an apocalyptic number.

It is an amenable number.

56673180661 is a deficient number, since it is larger than the sum of its proper divisors (2548284539).

56673180661 is a wasteful number, since it uses less digits than its factorization.

56673180661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46728.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 56673180661 in words is "fifty-six billion, six hundred seventy-three million, one hundred eighty thousand, six hundred sixty-one".