165016620 has 72 divisors (see below), whose sum is σ = 530004384. Its totient is φ = 41415168.

The previous prime is 165016619. The next prime is 165016673. The reversal of 165016620 is 26610561.

It is a happy number.

165016620 is a `hidden beast` number, since 1 + 650 + 1 + 6 + 6 + 2 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23904 + ... + 30023.

It is an arithmetic number, because the mean of its divisors is an integer number (7361172).

Almost surely, 2^165016620 is an apocalyptic number.

165016620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165016620 is an abundant number, since it is smaller than the sum of its proper divisors (364987764).

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

165016620 is a wasteful number, since it uses less digits than its factorization.

165016620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53959 (or 53954 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 165016620 is about 12845.8794949976. The cubic root of 165016620 is about 548.4990702785.

The spelling of 165016620 in words is "one hundred sixty-five million, sixteen thousand, six hundred twenty".