66652785650 has 48 divisors (see below), whose sum is σ = 142362718560. Its totient is φ = 22961721600.

The previous prime is 66652785607. The next prime is 66652785701. The reversal of 66652785650 is 5658725666.

It is a super-3 number, since 3×66652785650³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3178679 + ... + 3199578.

It is an arithmetic number, because the mean of its divisors is an integer number (2965889970).

Almost surely, 2^66652785650 is an apocalyptic number.

66652785650 is an abundant number, since it is smaller than the sum of its proper divisors (75709932910).

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

66652785650 is a wasteful number, since it uses less digits than its factorization.

66652785650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6378299 (or 6378294 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 56.

The spelling of 66652785650 in words is "sixty-six billion, six hundred fifty-two million, seven hundred eighty-five thousand, six hundred fifty".