75660421420 has 48 divisors (see below), whose sum is σ = 165902929920. Its totient is φ = 28929492416.

The previous prime is 75660421381. The next prime is 75660421433. The reversal of 75660421420 is 2412406657.

It is a self number, because there is not a number n which added to its sum of digits gives 75660421420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664389 + ... + 769891.

It is an arithmetic number, because the mean of its divisors is an integer number (3456311040).

Almost surely, 2^75660421420 is an apocalyptic number.

It is an amenable number.

75660421420 is an abundant number, since it is smaller than the sum of its proper divisors (90242508500).

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

75660421420 is a wasteful number, since it uses less digits than its factorization.

75660421420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107094 (or 107092 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 75660421420 in words is "seventy-five billion, six hundred sixty million, four hundred twenty-one thousand, four hundred twenty".