57750661 has 2 divisors, whose sum is σ = 57750662. Its totient is φ = 57750660.

The previous prime is 57750647. The next prime is 57750697. The reversal of 57750661 is 16605775.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56325025 + 1425636 = 7505^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 57750661 - 2¹³ = 57742469 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57750661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57750601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28875330 + 28875331.

It is an arithmetic number, because the mean of its divisors is an integer number (28875331).

Almost surely, 2^57750661 is an apocalyptic number.

It is an amenable number.

57750661 is a deficient number, since it is larger than the sum of its proper divisors (1).

57750661 is an equidigital number, since it uses as much as digits as its factorization.

57750661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 57750661 is about 7599.3855672679. The cubic root of 57750661 is about 386.5321773491.

The spelling of 57750661 in words is "fifty-seven million, seven hundred fifty thousand, six hundred sixty-one".