64667873 has 4 divisors (see below), whose sum is σ = 65447088. Its totient is φ = 63888660.

The previous prime is 64667857. The next prime is 64667879. The reversal of 64667873 is 37876646.

64667873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64667873 - 2⁴ = 64667857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64667879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389483 + ... + 389648.

It is an arithmetic number, because the mean of its divisors is an integer number (16361772).

Almost surely, 2^64667873 is an apocalyptic number.

It is an amenable number.

64667873 is a deficient number, since it is larger than the sum of its proper divisors (779215).

64667873 is an equidigital number, since it uses as much as digits as its factorization.

64667873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779214.

The product of its digits is 1016064, while the sum is 47.

The square root of 64667873 is about 8041.6337270483. The cubic root of 64667873 is about 401.3865899501.

The spelling of 64667873 in words is "sixty-four million, six hundred sixty-seven thousand, eight hundred seventy-three".