66757572074 has 16 divisors (see below), whose sum is σ = 101682107136. Its totient is φ = 32864790000.

The previous prime is 66757572071. The next prime is 66757572083. The reversal of 66757572074 is 47027575766.

It is a happy number.

It is a super-2 number, since 2×66757572074² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66757572071) 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, 206357 + ... + 419640.

It is an arithmetic number, because the mean of its divisors is an integer number (6355131696).

Almost surely, 2^66757572074 is an apocalyptic number.

66757572074 is a deficient number, since it is larger than the sum of its proper divisors (34924535062).

66757572074 is a wasteful number, since it uses less digits than its factorization.

66757572074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626821.

The product of its (nonzero) digits is 17287200, while the sum is 56.

The spelling of 66757572074 in words is "sixty-six billion, seven hundred fifty-seven million, five hundred seventy-two thousand, seventy-four".