72366657 has 16 divisors (see below), whose sum is σ = 105857280. Its totient is φ = 43610000.

The previous prime is 72366643. The next prime is 72366659. The reversal of 72366657 is 75666327.

It is a cyclic number.

It is not a de Polignac number, because 72366657 - 2⁷ = 72366529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72366659) 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, 219 + ... + 12032.

It is an arithmetic number, because the mean of its divisors is an integer number (6616080).

Almost surely, 2^72366657 is an apocalyptic number.

It is an amenable number.

72366657 is a deficient number, since it is larger than the sum of its proper divisors (33490623).

72366657 is a wasteful number, since it uses less digits than its factorization.

72366657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444.

The product of its digits is 317520, while the sum is 42.

The square root of 72366657 is about 8506.8594087360. The cubic root of 72366657 is about 416.7217519349.

The spelling of 72366657 in words is "seventy-two million, three hundred sixty-six thousand, six hundred fifty-seven".