5664690861 has 16 divisors (see below), whose sum is σ = 8094321024. Its totient is φ = 3514636224.

The previous prime is 5664690847. The next prime is 5664690877. The reversal of 5664690861 is 1680964665.

It is a happy number.

It is not a de Polignac number, because 5664690861 - 2⁹ = 5664690349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5664690841) 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, 1106866 + ... + 1111971.

It is an arithmetic number, because the mean of its divisors is an integer number (505895064).

Almost surely, 2^5664690861 is an apocalyptic number.

It is an amenable number.

5664690861 is a deficient number, since it is larger than the sum of its proper divisors (2429630163).

5664690861 is a wasteful number, since it uses less digits than its factorization.

5664690861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218900.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 5664690861 is about 75264.1406049388. The cubic root of 5664690861 is about 1782.6198492762.

The spelling of 5664690861 in words is "five billion, six hundred sixty-four million, six hundred ninety thousand, eight hundred sixty-one".