72663630 has 32 divisors (see below), whose sum is σ = 187808544. Its totient is φ = 17886336.

The previous prime is 72663611. The next prime is 72663631. The reversal of 72663630 is 3636627.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72663591 and 72663600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72663631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92769 + ... + 93548.

It is an arithmetic number, because the mean of its divisors is an integer number (5869017).

Almost surely, 2^72663630 is an apocalyptic number.

72663630 is an abundant number, since it is smaller than the sum of its proper divisors (115144914).

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

72663630 is a wasteful number, since it uses less digits than its factorization.

72663630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186340.

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 72663630 is about 8524.2964519073. The cubic root of 72663630 is about 417.2910113753.

The spelling of 72663630 in words is "seventy-two million, six hundred sixty-three thousand, six hundred thirty".