165366642 has 64 divisors (see below), whose sum is σ = 408084480. Its totient is φ = 43627584.

The previous prime is 165366637. The next prime is 165366661. The reversal of 165366642 is 246663561.

It is a super-2 number, since 2×165366642² = 54692252572712328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165366642.

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, 25063 + ... + 30965.

It is an arithmetic number, because the mean of its divisors is an integer number (6376320).

Almost surely, 2^165366642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165366642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204042240).

165366642 is an abundant number, since it is smaller than the sum of its proper divisors (242717838).

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

165366642 is a wasteful number, since it uses less digits than its factorization.

165366642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5967.

The product of its digits is 155520, while the sum is 39.

The square root of 165366642 is about 12859.4961798665. The cubic root of 165366642 is about 548.8866093402.

The spelling of 165366642 in words is "one hundred sixty-five million, three hundred sixty-six thousand, six hundred forty-two".