72326663 has 4 divisors (see below), whose sum is σ = 73512408. Its totient is φ = 71140920.

The previous prime is 72326659. The next prime is 72326671. The reversal of 72326663 is 36662327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36662327 = 13 ⋅2820179.

It is a cyclic number.

It is not a de Polignac number, because 72326663 - 2² = 72326659 is a prime.

It is a super-2 number, since 2×72326663² = 10462292361431138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72326263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592781 + ... + 592902.

It is an arithmetic number, because the mean of its divisors is an integer number (18378102).

Almost surely, 2^72326663 is an apocalyptic number.

72326663 is a deficient number, since it is larger than the sum of its proper divisors (1185745).

72326663 is a wasteful number, since it uses less digits than its factorization.

72326663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185744.

The product of its digits is 54432, while the sum is 35.

The square root of 72326663 is about 8504.5083926115. The cubic root of 72326663 is about 416.6449696080.

The spelling of 72326663 in words is "seventy-two million, three hundred twenty-six thousand, six hundred sixty-three".