66740667340 has 48 divisors (see below), whose sum is σ = 143976040992. Its totient is φ = 25968854016.

The previous prime is 66740667337. The next prime is 66740667347. The reversal of 66740667340 is 4376604766.

66740667340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66740667347) 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, 4748964 + ... + 4762996.

It is an arithmetic number, because the mean of its divisors is an integer number (2999500854).

Almost surely, 2^66740667340 is an apocalyptic number.

It is an amenable number.

66740667340 is an abundant number, since it is smaller than the sum of its proper divisors (77235373652).

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

66740667340 is a wasteful number, since it uses less digits than its factorization.

66740667340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20506 (or 20504 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 49.

The spelling of 66740667340 in words is "sixty-six billion, seven hundred forty million, six hundred sixty-seven thousand, three hundred forty".