66771092862840 has 128 divisors (see below), whose sum is σ = 200624616748800. Its totient is φ = 17777966469120.

The previous prime is 66771092862839. The next prime is 66771092862853. The reversal of 66771092862840 is 4826829017766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267161535 + ... + 267411345.

It is an arithmetic number, because the mean of its divisors is an integer number (1567379818350).

Almost surely, 2^{66771092862840} is an apocalyptic number.

66771092862840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66771092862840 is an abundant number, since it is smaller than the sum of its proper divisors (133853523885960).

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

66771092862840 is a wasteful number, since it uses less digits than its factorization.

66771092862840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253277 (or 253273 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 66.

The spelling of 66771092862840 in words is "sixty-six trillion, seven hundred seventy-one billion, ninety-two million, eight hundred sixty-two thousand, eight hundred forty".