572666681 has 2 divisors, whose sum is σ = 572666682. Its totient is φ = 572666680.

The previous prime is 572666671. The next prime is 572666693. The reversal of 572666681 is 186666275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314743081 + 257923600 = 17741^2 + 16060^2 .

It is a cyclic number.

It is not a de Polignac number, because 572666681 - 2¹⁸ = 572404537 is a prime.

It is a super-2 number, since 2×572666681² = 655894255055111522, which contains 22 as substring.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (572666651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286333340 + 286333341.

It is an arithmetic number, because the mean of its divisors is an integer number (286333341).

Almost surely, 2^572666681 is an apocalyptic number.

It is an amenable number.

572666681 is a deficient number, since it is larger than the sum of its proper divisors (1).

572666681 is an equidigital number, since it uses as much as digits as its factorization.

572666681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 572666681 is about 23930.4550938757. The cubic root of 572666681 is about 830.4254271361.

The spelling of 572666681 in words is "five hundred seventy-two million, six hundred sixty-six thousand, six hundred eighty-one".