747666620 has 24 divisors (see below), whose sum is σ = 1571787504. Its totient is φ = 298745216.

The previous prime is 747666617. The next prime is 747666629. The reversal of 747666620 is 26666747.

It is a happy number.

747666620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747666629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554 + ... + 38673.

It is an arithmetic number, because the mean of its divisors is an integer number (65491146).

Almost surely, 2^747666620 is an apocalyptic number.

It is an amenable number.

747666620 is an abundant number, since it is smaller than the sum of its proper divisors (824120884).

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

747666620 is a wasteful number, since it uses less digits than its factorization.

747666620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40189 (or 40187 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 747666620 is about 27343.4931930798. The cubic root of 747666620 is about 907.6170880552.

The spelling of 747666620 in words is "seven hundred forty-seven million, six hundred sixty-six thousand, six hundred twenty".