66707040340 has 24 divisors (see below), whose sum is σ = 147457668960. Its totient is φ = 25278457248.

The previous prime is 66707040331. The next prime is 66707040347. The reversal of 66707040340 is 4304070766.

It is a self number, because there is not a number n which added to its sum of digits gives 66707040340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66707040347) 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, 87772042 + ... + 87772801.

It is an arithmetic number, because the mean of its divisors is an integer number (6144069540).

Almost surely, 2^66707040340 is an apocalyptic number.

It is an amenable number.

66707040340 is an abundant number, since it is smaller than the sum of its proper divisors (80750628620).

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

66707040340 is a wasteful number, since it uses less digits than its factorization.

66707040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175544871 (or 175544869 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 66707040340 in words is "sixty-six billion, seven hundred seven million, forty thousand, three hundred forty".