66545000040 has 64 divisors (see below), whose sum is σ = 202907727360. Its totient is φ = 17454424320.

The previous prime is 66545000009. The next prime is 66545000047. The reversal of 66545000040 is 4000054566.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 66544999971 and 66545000007.

It is not an unprimeable number, because it can be changed into a prime (66545000047) 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, 4538104 + ... + 4552743.

It is an arithmetic number, because the mean of its divisors is an integer number (3170433240).

Almost surely, 2^66545000040 is an apocalyptic number.

66545000040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66545000040 is an abundant number, since it is smaller than the sum of its proper divisors (136362727320).

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

66545000040 is a wasteful number, since it uses less digits than its factorization.

66545000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090922 (or 9090918 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 66545000040 in words is "sixty-six billion, five hundred forty-five million, forty", and thus it is an aban number.