72668434 has 8 divisors (see below), whose sum is σ = 110496060. Its totient is φ = 35836416.

The previous prime is 72668419. The next prime is 72668437. The reversal of 72668434 is 43486627.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67815225 + 4853209 = 8235^2 + 2203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72668437) 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 3 ways as a sum of consecutive naturals, for example, 248719 + ... + 249010.

Almost surely, 2^72668434 is an apocalyptic number.

72668434 is a deficient number, since it is larger than the sum of its proper divisors (37827626).

72668434 is a wasteful number, since it uses less digits than its factorization.

72668434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497804.

The product of its digits is 193536, while the sum is 40.

The square root of 72668434 is about 8524.5782300358. The cubic root of 72668434 is about 417.3002072727.

The spelling of 72668434 in words is "seventy-two million, six hundred sixty-eight thousand, four hundred thirty-four".