5661164906 has 8 divisors (see below), whose sum is σ = 8504596164. Its totient is φ = 2826299520.

The previous prime is 5661164891. The next prime is 5661164953. The reversal of 5661164906 is 6094611665.

It can be written as a sum of positive squares in 2 ways, for example, as 5411809225 + 249355681 = 73565^2 + 15791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139815 + ... + 2142458.

Almost surely, 2^5661164906 is an apocalyptic number.

5661164906 is a deficient number, since it is larger than the sum of its proper divisors (2843431258).

5661164906 is a wasteful number, since it uses less digits than its factorization.

5661164906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282936.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 5661164906 is about 75240.7130880616. The cubic root of 5661164906 is about 1782.2499119405.

The spelling of 5661164906 in words is "five billion, six hundred sixty-one million, one hundred sixty-four thousand, nine hundred six".