42664656 has 40 divisors (see below), whose sum is σ = 111555360. Its totient is φ = 14048896.

The previous prime is 42664651. The next prime is 42664667. The reversal of 42664656 is 65646624.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42664651) 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, 1371 + ... + 9338.

It is an arithmetic number, because the mean of its divisors is an integer number (2788884).

Almost surely, 2^42664656 is an apocalyptic number.

It is an amenable number.

42664656 is an abundant number, since it is smaller than the sum of its proper divisors (68890704).

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

42664656 is a wasteful number, since it uses less digits than its factorization.

42664656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10803 (or 10797 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 42664656 is about 6531.8187360030. The cubic root of 42664656 is about 349.4266968110.

The spelling of 42664656 in words is "forty-two million, six hundred sixty-four thousand, six hundred fifty-six".