66760268538 has 16 divisors (see below), whose sum is σ = 134292334176. Its totient is φ = 22124790000.

The previous prime is 66760268537. The next prime is 66760268543. The reversal of 66760268538 is 83586206766.

It is not an unprimeable number, because it can be changed into a prime (66760268537) 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, 32157088 + ... + 32159163.

It is an arithmetic number, because the mean of its divisors is an integer number (8393270886).

Almost surely, 2^66760268538 is an apocalyptic number.

66760268538 is an abundant number, since it is smaller than the sum of its proper divisors (67532065638).

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

66760268538 is a wasteful number, since it uses less digits than its factorization.

66760268538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64316429.

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 66760268538 in words is "sixty-six billion, seven hundred sixty million, two hundred sixty-eight thousand, five hundred thirty-eight".