66888213332 has 12 divisors (see below), whose sum is σ = 117071151540. Its totient is φ = 33439312896.

The previous prime is 66888213289. The next prime is 66888213349. The reversal of 66888213332 is 23331288866.

66888213332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 27836920336 + 39051292996 = 166844^2 + 197614^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166957 + ... + 1222932.

It is an arithmetic number, because the mean of its divisors is an integer number (9755929295).

Almost surely, 2^66888213332 is an apocalyptic number.

It is an amenable number.

66888213332 is a deficient number, since it is larger than the sum of its proper divisors (50182938208).

66888213332 is a wasteful number, since it uses less digits than its factorization.

66888213332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396890 (or 2396888 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 50.

The spelling of 66888213332 in words is "sixty-six billion, eight hundred eighty-eight million, two hundred thirteen thousand, three hundred thirty-two".