165987016 has 16 divisors (see below), whose sum is σ = 335166300. Its totient is φ = 76609344.

The previous prime is 165987013. The next prime is 165987049. The reversal of 165987016 is 610789561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 157402116 + 8584900 = 12546^2 + 2930^2 .

It is not an unprimeable number, because it can be changed into a prime (165987013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797911 + ... + 798118.

Almost surely, 2^165987016 is an apocalyptic number.

It is an amenable number.

165987016 is an abundant number, since it is smaller than the sum of its proper divisors (169179284).

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

165987016 is a wasteful number, since it uses less digits than its factorization.

165987016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596048 (or 1596044 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 165987016 is about 12883.5948399505. The cubic root of 165987016 is about 549.5721366586.

The spelling of 165987016 in words is "one hundred sixty-five million, nine hundred eighty-seven thousand, sixteen".