5386666661 has 2 divisors, whose sum is σ = 5386666662. Its totient is φ = 5386666660.

The previous prime is 5386666657. The next prime is 5386666673. The reversal of 5386666661 is 1666666835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2869637761 + 2517028900 = 53569^2 + 50170^2 .

It is a cyclic number.

It is not a de Polignac number, because 5386666661 - 2² = 5386666657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5386666601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2693333330 + 2693333331.

It is an arithmetic number, because the mean of its divisors is an integer number (2693333331).

Almost surely, 2^5386666661 is an apocalyptic number.

It is an amenable number.

5386666661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5386666661 is an equidigital number, since it uses as much as digits as its factorization.

5386666661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 53.

The square root of 5386666661 is about 73393.9143321842. The cubic root of 5386666661 is about 1752.9654928593.

The spelling of 5386666661 in words is "five billion, three hundred eighty-six million, six hundred sixty-six thousand, six hundred sixty-one".