5666642120 has 32 divisors (see below), whose sum is σ = 12816024120. Its totient is φ = 2254909440.

The previous prime is 5666642101. The next prime is 5666642123. The reversal of 5666642120 is 212466665.

It can be written as a sum of positive squares in 4 ways, for example, as 1866412804 + 3800229316 = 43202^2 + 61646^2 .

It is a super-2 number, since 2×5666642120² = 64221665832316188800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5666642123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359291 + ... + 374730.

Almost surely, 2^5666642120 is an apocalyptic number.

It is an amenable number.

5666642120 is an abundant number, since it is smaller than the sum of its proper divisors (7149382000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5666642120 is a wasteful number, since it uses less digits than its factorization.

5666642120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734225 (or 734221 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 5666642120 is about 75277.1022290311. The cubic root of 5666642120 is about 1782.8245061469.

The spelling of 5666642120 in words is "five billion, six hundred sixty-six million, six hundred forty-two thousand, one hundred twenty".