66757040044 has 48 divisors (see below), whose sum is σ = 119159631360. Its totient is φ = 32716918080.

The previous prime is 66757040041. The next prime is 66757040101. The reversal of 66757040044 is 44004075766.

It is not an unprimeable number, because it can be changed into a prime (66757040041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76119334 + ... + 76120210.

It is an arithmetic number, because the mean of its divisors is an integer number (2482492320).

Almost surely, 2^66757040044 is an apocalyptic number.

It is an amenable number.

66757040044 is a deficient number, since it is larger than the sum of its proper divisors (52402591316).

66757040044 is a wasteful number, since it uses less digits than its factorization.

66757040044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 66757040044 in words is "sixty-six billion, seven hundred fifty-seven million, forty thousand, forty-four".