72766702440 has 192 divisors, whose sum is σ = 238069737360. Its totient is φ = 19275448320.

The previous prime is 72766702409. The next prime is 72766702453. The reversal of 72766702440 is 4420766727.

72766702440 is a `hidden beast` number, since 72 + 76 + 6 + 70 + 2 + 440 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 69971888484 + 2794813956 = 264522^2 + 52866^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42280780 + ... + 42282500.

Almost surely, 2^72766702440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72766702440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119034868680).

72766702440 is an abundant number, since it is smaller than the sum of its proper divisors (165303034920).

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

72766702440 is a wasteful number, since it uses less digits than its factorization.

72766702440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452 (or 2445 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 45.

The spelling of 72766702440 in words is "seventy-two billion, seven hundred sixty-six million, seven hundred two thousand, four hundred forty".