66757123876 has 9 divisors (see below), whose sum is σ = 116825871099. Its totient is φ = 33378303564.

The previous prime is 66757123871. The next prime is 66757123883. The reversal of 66757123876 is 67832175766.

The square root of 66757123876 is 258374.

It is a perfect power (a square), and thus also a powerful number.

66757123876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66757123876.

It is not an unprimeable number, because it can be changed into a prime (66757123871) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 452155 + ... + 581341.

Almost surely, 2^66757123876 is an apocalyptic number.

66757123876 is the 258374-th square number.

It is an amenable number.

66757123876 is a deficient number, since it is larger than the sum of its proper divisors (50068747223).

66757123876 is an frugal number, since it uses more digits than its factorization.

66757123876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258378 (or 129189 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 58.

The spelling of 66757123876 in words is "sixty-six billion, seven hundred fifty-seven million, one hundred twenty-three thousand, eight hundred seventy-six".