72661326 has 8 divisors (see below), whose sum is σ = 145322664. Its totient is φ = 24220440.

The previous prime is 72661313. The next prime is 72661331. The reversal of 72661326 is 62316627.

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

72661326 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 6055105 + ... + 6055116.

It is an arithmetic number, because the mean of its divisors is an integer number (18165333).

Almost surely, 2^72661326 is an apocalyptic number.

72661326 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72661326 is a wasteful number, since it uses less digits than its factorization.

72661326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12110226.

The product of its digits is 18144, while the sum is 33.

The square root of 72661326 is about 8524.1613077182. The cubic root of 72661326 is about 417.2866008761.

The spelling of 72661326 in words is "seventy-two million, six hundred sixty-one thousand, three hundred twenty-six".