5661664145 has 8 divisors (see below), whose sum is σ = 6813578304. Its totient is φ = 4516277104.

The previous prime is 5661664117. The next prime is 5661664159. The reversal of 5661664145 is 5414661665.

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

It is a cyclic number.

It is not a de Polignac number, because 5661664145 - 2⁶ = 5661664081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5661664096 and 5661664105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1629869 + ... + 1633338.

It is an arithmetic number, because the mean of its divisors is an integer number (851697288).

Almost surely, 2^5661664145 is an apocalyptic number.

It is an amenable number.

5661664145 is a deficient number, since it is larger than the sum of its proper divisors (1151914159).

5661664145 is a wasteful number, since it uses less digits than its factorization.

5661664145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263559.

The product of its digits is 518400, while the sum is 44.

The square root of 5661664145 is about 75244.0306270205. The cubic root of 5661664145 is about 1782.3023005993.

The spelling of 5661664145 in words is "five billion, six hundred sixty-one million, six hundred sixty-four thousand, one hundred forty-five".