66740748140 has 24 divisors (see below), whose sum is σ = 152896987152. Its totient is φ = 24269362880.

The previous prime is 66740748097. The next prime is 66740748143. The reversal of 66740748140 is 4184704766.

It is not an unprimeable number, because it can be changed into a prime (66740748143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151683299 + ... + 151683738.

It is an arithmetic number, because the mean of its divisors is an integer number (6370707798).

Almost surely, 2^66740748140 is an apocalyptic number.

It is an amenable number.

66740748140 is an abundant number, since it is smaller than the sum of its proper divisors (86156239012).

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

66740748140 is a wasteful number, since it uses less digits than its factorization.

66740748140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303367057 (or 303367055 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 66740748140 in words is "sixty-six billion, seven hundred forty million, seven hundred forty-eight thousand, one hundred forty".