73666736 has 60 divisors (see below), whose sum is σ = 169010016. Its totient is φ = 30898560.

The previous prime is 73666657. The next prime is 73666753. The reversal of 73666736 is 63766637.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23705 + ... + 26631.

Almost surely, 2^73666736 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 73666736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84505008).

73666736 is an abundant number, since it is smaller than the sum of its proper divisors (95343280).

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

73666736 is a wasteful number, since it uses less digits than its factorization.

73666736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970 (or 2953 counting only the distinct ones).

The product of its digits is 571536, while the sum is 44.

The square root of 73666736 is about 8582.9328320802. The cubic root of 73666736 is about 419.2024471527.

Subtracting from 73666736 its reverse (63766637), we obtain a palindrome (9900099).

The spelling of 73666736 in words is "seventy-three million, six hundred sixty-six thousand, seven hundred thirty-six".