42664071 has 16 divisors (see below), whose sum is σ = 59390048. Its totient is φ = 27216000.

The previous prime is 42664043. The next prime is 42664073. The reversal of 42664071 is 17046624.

It is not a de Polignac number, because 42664071 - 2¹¹ = 42662023 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42664073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3621 + ... + 9921.

It is an arithmetic number, because the mean of its divisors is an integer number (3711878).

Almost surely, 2^42664071 is an apocalyptic number.

42664071 is a deficient number, since it is larger than the sum of its proper divisors (16725977).

42664071 is a wasteful number, since it uses less digits than its factorization.

42664071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 42664071 is about 6531.7739550600. The cubic root of 42664071 is about 349.4250997393.

The spelling of 42664071 in words is "forty-two million, six hundred sixty-four thousand, seventy-one".