66678573330 has 32 divisors (see below), whose sum is σ = 177809529600. Its totient is φ = 17780952816.

The previous prime is 66678573319. The next prime is 66678573331. The reversal of 66678573330 is 3337587666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66678573331) 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, 123478570 + ... + 123479109.

It is an arithmetic number, because the mean of its divisors is an integer number (5556547800).

Almost surely, 2^66678573330 is an apocalyptic number.

66678573330 is an abundant number, since it is smaller than the sum of its proper divisors (111130956270).

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

66678573330 is a wasteful number, since it uses less digits than its factorization.

66678573330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246957695 (or 246957689 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 54.

The spelling of 66678573330 in words is "sixty-six billion, six hundred seventy-eight million, five hundred seventy-three thousand, three hundred thirty".