165501616 has 80 divisors (see below), whose sum is σ = 381672000. Its totient is φ = 69468672.

The previous prime is 165501607. The next prime is 165501631. The reversal of 165501616 is 616105561.

It is a super-2 number, since 2×165501616² = 54781569797222912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290580 + ... + 291148.

It is an arithmetic number, because the mean of its divisors is an integer number (4770900).

Almost surely, 2^165501616 is an apocalyptic number.

165501616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165501616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190836000).

165501616 is an abundant number, since it is smaller than the sum of its proper divisors (216170384).

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

165501616 is an equidigital number, since it uses as much as digits as its factorization.

165501616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 631 counting only the distinct ones).

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

The square root of 165501616 is about 12864.7431377389. The cubic root of 165501616 is about 549.0359044117.

The spelling of 165501616 in words is "one hundred sixty-five million, five hundred one thousand, six hundred sixteen".