42664555 has 4 divisors (see below), whose sum is σ = 51197472. Its totient is φ = 34131640.

The previous prime is 42664547. The next prime is 42664603. The reversal of 42664555 is 55546624.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42664555 - 2³ = 42664547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4266451 + ... + 4266460.

It is an arithmetic number, because the mean of its divisors is an integer number (12799368).

Almost surely, 2^42664555 is an apocalyptic number.

42664555 is a deficient number, since it is larger than the sum of its proper divisors (8532917).

42664555 is an equidigital number, since it uses as much as digits as its factorization.

42664555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532916.

The product of its digits is 144000, while the sum is 37.

The square root of 42664555 is about 6531.8110046143. The cubic root of 42664555 is about 349.4264210783.

The spelling of 42664555 in words is "forty-two million, six hundred sixty-four thousand, five hundred fifty-five".