75427021664 has 48 divisors (see below), whose sum is σ = 151067125440. Its totient is φ = 37061220480.

The previous prime is 75427021633. The next prime is 75427021667. The reversal of 75427021664 is 46612072457.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75427021667) 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, 7416647 + ... + 7426809.

It is an arithmetic number, because the mean of its divisors is an integer number (3147231780).

Almost surely, 2^75427021664 is an apocalyptic number.

It is an amenable number.

75427021664 is an abundant number, since it is smaller than the sum of its proper divisors (75640103776).

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

75427021664 is a wasteful number, since it uses less digits than its factorization.

75427021664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14163 (or 14155 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 75427021664 in words is "seventy-five billion, four hundred twenty-seven million, twenty-one thousand, six hundred sixty-four".