72366665 has 16 divisors (see below), whose sum is σ = 99383808. Its totient is φ = 49553856.

The previous prime is 72366659. The next prime is 72366673. The reversal of 72366665 is 56666327.

It is a cyclic number.

It is not a de Polignac number, because 72366665 - 2¹⁰ = 72365641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49079 + ... + 50531.

It is an arithmetic number, because the mean of its divisors is an integer number (6211488).

Almost surely, 2^72366665 is an apocalyptic number.

It is an amenable number.

72366665 is a deficient number, since it is larger than the sum of its proper divisors (27017143).

72366665 is a wasteful number, since it uses less digits than its factorization.

72366665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888.

The product of its digits is 272160, while the sum is 41.

The square root of 72366665 is about 8506.8598789448. The cubic root of 72366665 is about 416.7217672909.

The spelling of 72366665 in words is "seventy-two million, three hundred sixty-six thousand, six hundred sixty-five".