72664358 has 32 divisors (see below), whose sum is σ = 125919360. Its totient is φ = 31150080.

The previous prime is 72664357. The next prime is 72664369. The reversal of 72664358 is 85346627.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72664357) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 33878 + ... + 35958.

It is an arithmetic number, because the mean of its divisors is an integer number (3934980).

Almost surely, 2^72664358 is an apocalyptic number.

72664358 is a deficient number, since it is larger than the sum of its proper divisors (53255002).

72664358 is a wasteful number, since it uses less digits than its factorization.

72664358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192.

The product of its digits is 241920, while the sum is 41.

The square root of 72664358 is about 8524.3391532716. The cubic root of 72664358 is about 417.2924049512.

The spelling of 72664358 in words is "seventy-two million, six hundred sixty-four thousand, three hundred fifty-eight".