165786412770 has 128 divisors (see below), whose sum is σ = 482520084480. Its totient is φ = 40171285440.

The previous prime is 165786412747. The next prime is 165786412807. The reversal of 165786412770 is 77214687561.

165786412770 is a `hidden beast` number, since 1 + 6 + 578 + 6 + 41 + 27 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6720679 + ... + 6745301.

It is an arithmetic number, because the mean of its divisors is an integer number (3769688160).

Almost surely, 2^165786412770 is an apocalyptic number.

165786412770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165786412770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241260042240).

165786412770 is an abundant number, since it is smaller than the sum of its proper divisors (316733671710).

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

165786412770 is a wasteful number, since it uses less digits than its factorization.

165786412770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26917 (or 26911 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 54.

The spelling of 165786412770 in words is "one hundred sixty-five billion, seven hundred eighty-six million, four hundred twelve thousand, seven hundred seventy".