64674449 has 4 divisors (see below), whose sum is σ = 73913664. Its totient is φ = 55435236.

The previous prime is 64674439. The next prime is 64674479. The reversal of 64674449 is 94447646.

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 64674449 - 2⁴ = 64674433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64674419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619597 + ... + 4619610.

It is an arithmetic number, because the mean of its divisors is an integer number (18478416).

Almost surely, 2^64674449 is an apocalyptic number.

It is an amenable number.

64674449 is a deficient number, since it is larger than the sum of its proper divisors (9239215).

64674449 is an equidigital number, since it uses as much as digits as its factorization.

64674449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239214.

The product of its digits is 580608, while the sum is 44.

The square root of 64674449 is about 8042.0425887955. The cubic root of 64674449 is about 401.4001949992.

The spelling of 64674449 in words is "sixty-four million, six hundred seventy-four thousand, four hundred forty-nine".