73161660 has 96 divisors (see below), whose sum is σ = 240694272. Its totient is φ = 16369920.

The previous prime is 73161653. The next prime is 73161667. The reversal of 73161660 is 6616137.

It is an interprime number because it is at equal distance from previous prime (73161653) and next prime (73161667).

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 (73161667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4317 + ... + 12843.

It is an arithmetic number, because the mean of its divisors is an integer number (2507232).

Almost surely, 2^73161660 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 73161660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120347136).

73161660 is an abundant number, since it is smaller than the sum of its proper divisors (167532612).

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

73161660 is a wasteful number, since it uses less digits than its factorization.

73161660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8563 (or 8561 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 73161660 is about 8553.4589494543. The cubic root of 73161660 is about 418.2421999365.

Adding to 73161660 its reverse (6616137), we get a palindrome (79777797).

The spelling of 73161660 in words is "seventy-three million, one hundred sixty-one thousand, six hundred sixty".