5661276256657 has 16 divisors (see below), whose sum is σ = 6518554806400. Its totient is φ = 4816150099200.

The previous prime is 5661276256651. The next prime is 5661276256733. The reversal of 5661276256657 is 7566526721665.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 5661276256657 - 2⁷ = 5661276256529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661276256651) 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, 2330569 + ... + 4093177.

It is an arithmetic number, because the mean of its divisors is an integer number (407409675400).

Almost surely, 2^{5661276256657} is an apocalyptic number.

It is an amenable number.

5661276256657 is a deficient number, since it is larger than the sum of its proper divisors (857278549743).

5661276256657 is a wasteful number, since it uses less digits than its factorization.

5661276256657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766056.

The product of its digits is 190512000, while the sum is 64.

The spelling of 5661276256657 in words is "five trillion, six hundred sixty-one billion, two hundred seventy-six million, two hundred fifty-six thousand, six hundred fifty-seven".