165706422770 has 24 divisors (see below), whose sum is σ = 346968959724. Its totient is φ = 56813630496.

The previous prime is 165706422769. The next prime is 165706422773. The reversal of 165706422770 is 77224607561.

It can be written as a sum of positive squares in 2 ways, for example, as 161685214201 + 4021208569 = 402101^2 + 63413^2 .

It is not an unprimeable number, because it can be changed into a prime (165706422773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169087697 + ... + 169088676.

Almost surely, 2^165706422770 is an apocalyptic number.

165706422770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165706422770 is an abundant number, since it is smaller than the sum of its proper divisors (181262536954).

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

165706422770 is a wasteful number, since it uses less digits than its factorization.

165706422770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338176394 (or 338176387 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 165706422770 in words is "one hundred sixty-five billion, seven hundred six million, four hundred twenty-two thousand, seven hundred seventy".