57000661 has 8 divisors (see below), whose sum is σ = 58926848. Its totient is φ = 55080000.

The previous prime is 57000641. The next prime is 57000679. The reversal of 57000661 is 16600075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 4-Lehmer number, since φ(57000661) divides (57000661-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 57000661 - 2¹⁹ = 56476373 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 (57000641) 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, 36466 + ... + 37996.

It is an arithmetic number, because the mean of its divisors is an integer number (7365856).

Almost surely, 2^57000661 is an apocalyptic number.

It is an amenable number.

57000661 is a deficient number, since it is larger than the sum of its proper divisors (1926187).

57000661 is a wasteful number, since it uses less digits than its factorization.

57000661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 57000661 is about 7549.8782109382. The cubic root of 57000661 is about 384.8516007589.

The spelling of 57000661 in words is "fifty-seven million, six hundred sixty-one", and thus it is an aban number.