165700026 has 64 divisors (see below), whose sum is σ = 401040000. Its totient is φ = 50512896.

The previous prime is 165699977. The next prime is 165700033. The reversal of 165700026 is 620007561.

165700026 is a `hidden beast` number, since 1 + 657 + 0 + 0 + 0 + 2 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26970 + ... + 32538.

It is an arithmetic number, because the mean of its divisors is an integer number (6266250).

Almost surely, 2^165700026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165700026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200520000).

165700026 is an abundant number, since it is smaller than the sum of its proper divisors (235339974).

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

165700026 is a wasteful number, since it uses less digits than its factorization.

165700026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628 (or 5622 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 165700026 is about 12872.4522139334. The cubic root of 165700026 is about 549.2552189091.

Adding to 165700026 its reverse (620007561), we get a palindrome (785707587).

The spelling of 165700026 in words is "one hundred sixty-five million, seven hundred thousand, twenty-six".