66754750722 has 16 divisors (see below), whose sum is σ = 145646728992. Its totient is φ = 20228712320.

The previous prime is 66754750681. The next prime is 66754750723. The reversal of 66754750722 is 22705745766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66754750723) 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, 505717743 + ... + 505717874.

It is an arithmetic number, because the mean of its divisors is an integer number (9102920562).

Almost surely, 2^66754750722 is an apocalyptic number.

66754750722 is an abundant number, since it is smaller than the sum of its proper divisors (78891978270).

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

66754750722 is a wasteful number, since it uses less digits than its factorization.

66754750722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011435633.

The product of its (nonzero) digits is 4939200, while the sum is 51.

The spelling of 66754750722 in words is "sixty-six billion, seven hundred fifty-four million, seven hundred fifty thousand, seven hundred twenty-two".