64674321 has 16 divisors (see below), whose sum is σ = 93087360. Its totient is φ = 39818240.

The previous prime is 64674317. The next prime is 64674349. The reversal of 64674321 is 12347646.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64674321 - 2² = 64674317 is a prime.

It is a super-2 number, since 2×64674321² = 8365535593622082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64674361) 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, 14160 + ... + 18161.

It is an arithmetic number, because the mean of its divisors is an integer number (5817960).

Almost surely, 2^64674321 is an apocalyptic number.

It is an amenable number.

64674321 is a deficient number, since it is larger than the sum of its proper divisors (28413039).

64674321 is a wasteful number, since it uses less digits than its factorization.

64674321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32376.

The product of its digits is 24192, while the sum is 33.

The square root of 64674321 is about 8042.0346306143. The cubic root of 64674321 is about 401.3999301895.

The spelling of 64674321 in words is "sixty-four million, six hundred seventy-four thousand, three hundred twenty-one".