786644661066 has 48 divisors (see below), whose sum is σ = 1729425778752. Its totient is φ = 238362315840.

The previous prime is 786644661059. The next prime is 786644661071. The reversal of 786644661066 is 660166446687.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 19046310 + ... + 19087566.

It is an arithmetic number, because the mean of its divisors is an integer number (36029703724).

Almost surely, 2^786644661066 is an apocalyptic number.

786644661066 is an abundant number, since it is smaller than the sum of its proper divisors (942781117686).

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

786644661066 is a wasteful number, since it uses less digits than its factorization.

786644661066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67547 (or 67536 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 60.

The spelling of 786644661066 in words is "seven hundred eighty-six billion, six hundred forty-four million, six hundred sixty-one thousand, sixty-six".