57920666 has 16 divisors (see below), whose sum is σ = 93030120. Its totient is φ = 26949120.

The previous prime is 57920663. The next prime is 57920669. The reversal of 57920666 is 66602975.

It is an interprime number because it is at equal distance from previous prime (57920663) and next prime (57920669).

It can be written as a sum of positive squares in 4 ways, for example, as 49632025 + 8288641 = 7045^2 + 2879^2 .

It is not an unprimeable number, because it can be changed into a prime (57920663) 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, 6545 + ... + 12596.

Almost surely, 2^57920666 is an apocalyptic number.

57920666 is a deficient number, since it is larger than the sum of its proper divisors (35109454).

57920666 is a wasteful number, since it uses less digits than its factorization.

57920666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19249.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 57920666 is about 7610.5627912790. The cubic root of 57920666 is about 386.9110938040.

The spelling of 57920666 in words is "fifty-seven million, nine hundred twenty thousand, six hundred sixty-six".