42664655 has 32 divisors (see below), whose sum is σ = 60341760. Its totient is φ = 28631680.

The previous prime is 42664651. The next prime is 42664667. The reversal of 42664655 is 55646624.

It is not a de Polignac number, because 42664655 - 2² = 42664651 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 36104 + ... + 37266.

It is an arithmetic number, because the mean of its divisors is an integer number (1885680).

Almost surely, 2^42664655 is an apocalyptic number.

42664655 is a deficient number, since it is larger than the sum of its proper divisors (17677105).

42664655 is a wasteful number, since it uses less digits than its factorization.

42664655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231.

The product of its digits is 172800, while the sum is 38.

The square root of 42664655 is about 6531.8186594547. The cubic root of 42664655 is about 349.4266940810.

The spelling of 42664655 in words is "forty-two million, six hundred sixty-four thousand, six hundred fifty-five".