66676668140 has 24 divisors (see below), whose sum is σ = 141028354320. Its totient is φ = 26478790848.

The previous prime is 66676668109. The next prime is 66676668151. The reversal of 66676668140 is 4186667666.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11989427 + ... + 11994986.

It is an arithmetic number, because the mean of its divisors is an integer number (5876181430).

Almost surely, 2^66676668140 is an apocalyptic number.

It is an amenable number.

66676668140 is an abundant number, since it is smaller than the sum of its proper divisors (74351686180).

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

66676668140 is a wasteful number, since it uses less digits than its factorization.

66676668140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23984561 (or 23984559 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 56.

The spelling of 66676668140 in words is "sixty-six billion, six hundred seventy-six million, six hundred sixty-eight thousand, one hundred forty".