66740403340 has 24 divisors (see below), whose sum is σ = 150935989680. Its totient is φ = 24642610368.

The previous prime is 66740403313. The next prime is 66740403413. The reversal of 66740403340 is 4330404766.

It is a self number, because there is not a number n which added to its sum of digits gives 66740403340.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128346670 + ... + 128347189.

It is an arithmetic number, because the mean of its divisors is an integer number (6288999570).

Almost surely, 2^66740403340 is an apocalyptic number.

It is an amenable number.

66740403340 is an abundant number, since it is smaller than the sum of its proper divisors (84195586340).

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

66740403340 is a wasteful number, since it uses less digits than its factorization.

66740403340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256693881 (or 256693879 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 37.

The spelling of 66740403340 in words is "sixty-six billion, seven hundred forty million, four hundred three thousand, three hundred forty".