66212737608 has 32 divisors (see below), whose sum is σ = 168655089600. Its totient is φ = 21654479808.

The previous prime is 66212737603. The next prime is 66212737609. The reversal of 66212737608 is 80673721266.

It is a super-3 number, since 3×66212737608³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66212737603) by changing a digit.

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, 26025748 + ... + 26028291.

It is an arithmetic number, because the mean of its divisors is an integer number (5270471550).

Almost surely, 2^66212737608 is an apocalyptic number.

It is an amenable number.

66212737608 is an abundant number, since it is smaller than the sum of its proper divisors (102442351992).

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

66212737608 is a wasteful number, since it uses less digits than its factorization.

66212737608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52054101 (or 52054097 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 66212737608 in words is "sixty-six billion, two hundred twelve million, seven hundred thirty-seven thousand, six hundred eight".