66889562940 has 48 divisors (see below), whose sum is σ = 208100864160. Its totient is φ = 17837216640.

The previous prime is 66889562921. The next prime is 66889563007. The reversal of 66889562940 is 4926598866.

66889562940 is a `hidden beast` number, since 6 + 68 + 8 + 9 + 562 + 9 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61934241 + ... + 61935320.

It is an arithmetic number, because the mean of its divisors is an integer number (4335434670).

Almost surely, 2^66889562940 is an apocalyptic number.

66889562940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66889562940 is an abundant number, since it is smaller than the sum of its proper divisors (141211301220).

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

66889562940 is a wasteful number, since it uses less digits than its factorization.

66889562940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123869579 (or 123869571 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 66889562940 in words is "sixty-six billion, eight hundred eighty-nine million, five hundred sixty-two thousand, nine hundred forty".