72406663 has 12 divisors (see below), whose sum is σ = 88662360. Its totient is φ = 58795632.

The previous prime is 72406661. The next prime is 72406679. The reversal of 72406663 is 36660427.

It is not a de Polignac number, because 72406663 - 2¹ = 72406661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72406661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37956 + ... + 39817.

It is an arithmetic number, because the mean of its divisors is an integer number (7388530).

Almost surely, 2^72406663 is an apocalyptic number.

72406663 is a deficient number, since it is larger than the sum of its proper divisors (16255697).

72406663 is a wasteful number, since it uses less digits than its factorization.

72406663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77806 (or 77799 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 72406663 is about 8509.2104804147. The cubic root of 72406663 is about 416.7985290030.

The spelling of 72406663 in words is "seventy-two million, four hundred six thousand, six hundred sixty-three".