57220766 has 8 divisors (see below), whose sum is σ = 85878144. Its totient is φ = 28594720.

The previous prime is 57220753. The next prime is 57220769. The reversal of 57220766 is 66702275.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57220769) 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, 2555 + ... + 10998.

It is an arithmetic number, because the mean of its divisors is an integer number (10734768).

Almost surely, 2^57220766 is an apocalyptic number.

57220766 is a deficient number, since it is larger than the sum of its proper divisors (28657378).

57220766 is a wasteful number, since it uses less digits than its factorization.

57220766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15666.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 57220766 is about 7564.4408914341. The cubic root of 57220766 is about 385.3463258019.

The spelling of 57220766 in words is "fifty-seven million, two hundred twenty thousand, seven hundred sixty-six".