66757433475766 has 24 divisors (see below), whose sum is σ = 114852530186352. Its totient is φ = 29024971074000.

The previous prime is 66757433475763. The next prime is 66757433475791.

It is a happy number.

66757433475766 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66757433475692 and 66757433475701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66757433475763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5996889285 + ... + 5996900416.

It is an arithmetic number, because the mean of its divisors is an integer number (4785522091098).

Almost surely, 2^{66757433475766} is an apocalyptic number.

66757433475766 is a deficient number, since it is larger than the sum of its proper divisors (48095096710586).

66757433475766 is a wasteful number, since it uses less digits than its factorization.

66757433475766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11993789748 (or 11993789737 counting only the distinct ones).

The product of its digits is 11202105600, while the sum is 76.

The spelling of 66757433475766 in words is "sixty-six trillion, seven hundred fifty-seven billion, four hundred thirty-three million, four hundred seventy-five thousand, seven hundred sixty-six".