42657666 has 32 divisors (see below), whose sum is σ = 89726400. Its totient is φ = 13500480.

The previous prime is 42657647. The next prime is 42657673. The reversal of 42657666 is 66675624.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8605 + ... + 12623.

It is an arithmetic number, because the mean of its divisors is an integer number (2803950).

Almost surely, 2^42657666 is an apocalyptic number.

42657666 is an abundant number, since it is smaller than the sum of its proper divisors (47068734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42657666 is a wasteful number, since it uses less digits than its factorization.

42657666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114.

The product of its digits is 362880, while the sum is 42.

The square root of 42657666 is about 6531.2836410617. The cubic root of 42657666 is about 349.4076128960.

The spelling of 42657666 in words is "forty-two million, six hundred fifty-seven thousand, six hundred sixty-six".