73165620 has 96 divisors (see below), whose sum is σ = 236670336. Its totient is φ = 16691200.

The previous prime is 73165591. The next prime is 73165621. The reversal of 73165620 is 2656137.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73165621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7960 + ... + 14480.

It is an arithmetic number, because the mean of its divisors is an integer number (2465316).

Almost surely, 2^73165620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73165620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118335168).

73165620 is an abundant number, since it is smaller than the sum of its proper divisors (163504716).

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

73165620 is a wasteful number, since it uses less digits than its factorization.

73165620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561 (or 6559 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 73165620 is about 8553.6904316207. The cubic root of 73165620 is about 418.2497458252.

The spelling of 73165620 in words is "seventy-three million, one hundred sixty-five thousand, six hundred twenty".