66643650112602 has 32 divisors (see below), whose sum is σ = 141182156639232. Its totient is φ = 20899748542464.

The previous prime is 66643650112577. The next prime is 66643650112609. The reversal of 66643650112602 is 20621105634666.

It is a super-2 number, since 2×66643650112602² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66643650112609) 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, 125722618 + ... + 126251589.

It is an arithmetic number, because the mean of its divisors is an integer number (4411942394976).

Almost surely, 2^{66643650112602} is an apocalyptic number.

66643650112602 is an abundant number, since it is smaller than the sum of its proper divisors (74538506526630).

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

66643650112602 is a wasteful number, since it uses less digits than its factorization.

66643650112602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251976822.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 66643650112602 in words is "sixty-six trillion, six hundred forty-three billion, six hundred fifty million, one hundred twelve thousand, six hundred two".