572665861 has 4 divisors (see below), whose sum is σ = 572723424. Its totient is φ = 572608300.

The previous prime is 572665853. The next prime is 572665963. The reversal of 572665861 is 168566275.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 572665861 - 2³ = 572665853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (572665361) 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, 9595 + ... + 35176.

It is an arithmetic number, because the mean of its divisors is an integer number (143180856).

Almost surely, 2^572665861 is an apocalyptic number.

It is an amenable number.

572665861 is a deficient number, since it is larger than the sum of its proper divisors (57563).

572665861 is a wasteful number, since it uses less digits than its factorization.

572665861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57562.

The product of its digits is 604800, while the sum is 46.

The square root of 572665861 is about 23930.4379608899. The cubic root of 572665861 is about 830.4250307746.

The spelling of 572665861 in words is "five hundred seventy-two million, six hundred sixty-five thousand, eight hundred sixty-one".