5666788901 has 4 divisors (see below), whose sum is σ = 5718777900. Its totient is φ = 5614799904.

The previous prime is 5666788889. The next prime is 5666788937. The reversal of 5666788901 is 1098876665.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3297630625 + 2369158276 = 57425^2 + 48674^2 .

It is a cyclic number.

It is not a de Polignac number, because 5666788901 - 2⁶ = 5666788837 is a prime.

It is a super-2 number, since 2×5666788901² = 64224992896993575602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5666787901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25994336 + ... + 25994553.

It is an arithmetic number, because the mean of its divisors is an integer number (1429694475).

Almost surely, 2^5666788901 is an apocalyptic number.

It is an amenable number.

5666788901 is a deficient number, since it is larger than the sum of its proper divisors (51988999).

5666788901 is a wasteful number, since it uses less digits than its factorization.

5666788901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51988998.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 5666788901 is about 75278.0771606183. The cubic root of 5666788901 is about 1782.8398993021.

The spelling of 5666788901 in words is "five billion, six hundred sixty-six million, seven hundred eighty-eight thousand, nine hundred one".