165561016 has 8 divisors (see below), whose sum is σ = 310426920. Its totient is φ = 82780504.

The previous prime is 165561001. The next prime is 165561031. The reversal of 165561016 is 610165561.

165561016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165561001) and next prime (165561031).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10347556 + ... + 10347571.

It is an arithmetic number, because the mean of its divisors is an integer number (38803365).

Almost surely, 2^165561016 is an apocalyptic number.

It is an amenable number.

165561016 is a deficient number, since it is larger than the sum of its proper divisors (144865904).

165561016 is a wasteful number, since it uses less digits than its factorization.

165561016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20695133 (or 20695129 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 165561016 is about 12867.0515659183. The cubic root of 165561016 is about 549.1015811759.

The spelling of 165561016 in words is "one hundred sixty-five million, five hundred sixty-one thousand, sixteen".