72666648 has 24 divisors (see below), whose sum is σ = 196805700. Its totient is φ = 24222192.

The previous prime is 72666647. The next prime is 72666667. The reversal of 72666648 is 84666627.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72666647) 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 5 ways as a sum of consecutive naturals, for example, 504558 + ... + 504701.

Almost surely, 2^72666648 is an apocalyptic number.

It is an amenable number.

72666648 is an abundant number, since it is smaller than the sum of its proper divisors (124139052).

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

72666648 is a wasteful number, since it uses less digits than its factorization.

72666648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009271 (or 1009264 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 72666648 is about 8524.4734734762. The cubic root of 72666648 is about 417.2967885289.

The spelling of 72666648 in words is "seventy-two million, six hundred sixty-six thousand, six hundred forty-eight".