747666720 has 192 divisors, whose sum is σ = 2754864000. Its totient is φ = 188863488.

The previous prime is 747666631. The next prime is 747666737. The reversal of 747666720 is 27666747.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77526 + ... + 86634.

It is an arithmetic number, because the mean of its divisors is an integer number (14348250).

Almost surely, 2^747666720 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 747666720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377432000).

747666720 is an abundant number, since it is smaller than the sum of its proper divisors (2007197280).

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

747666720 is a wasteful number, since it uses less digits than its factorization.

747666720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9152 (or 9138 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The square root of 747666720 is about 27343.4950216683. The cubic root of 747666720 is about 907.6171285196.

The spelling of 747666720 in words is "seven hundred forty-seven million, six hundred sixty-six thousand, seven hundred twenty".