165602061887 has 8 divisors (see below), whose sum is σ = 167029768752. Its totient is φ = 164176833600.

The previous prime is 165602061857. The next prime is 165602061899. The reversal of 165602061887 is 788160206561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165602061887 - 2²⁸ = 165333626431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165602061827) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 485318 + ... + 752819.

It is an arithmetic number, because the mean of its divisors is an integer number (20878721094).

Almost surely, 2^165602061887 is an apocalyptic number.

165602061887 is a deficient number, since it is larger than the sum of its proper divisors (1427706865).

165602061887 is a wasteful number, since it uses less digits than its factorization.

165602061887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239289.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 165602061887 in words is "one hundred sixty-five billion, six hundred two million, sixty-one thousand, eight hundred eighty-seven".