66737406737328 has 80 divisors (see below), whose sum is σ = 172687608952320. Its totient is φ = 22209360219648.

The previous prime is 66737406737321. The next prime is 66737406737437. The reversal of 66737406737328 is 82373760473766.

It is not an unprimeable number, because it can be changed into a prime (66737406737321) 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, 76477453 + ... + 77345171.

It is an arithmetic number, because the mean of its divisors is an integer number (2158595111904).

Almost surely, 2^{66737406737328} is an apocalyptic number.

It is an amenable number.

66737406737328 is an abundant number, since it is smaller than the sum of its proper divisors (105950202214992).

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

66737406737328 is a wasteful number, since it uses less digits than its factorization.

66737406737328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870354 (or 870348 counting only the distinct ones).

The product of its (nonzero) digits is 896168448, while the sum is 69.

The spelling of 66737406737328 in words is "sixty-six trillion, seven hundred thirty-seven billion, four hundred six million, seven hundred thirty-seven thousand, three hundred twenty-eight".