73728666 has 24 divisors (see below), whose sum is σ = 174268224. Its totient is φ = 22341960.

The previous prime is 73728661. The next prime is 73728667. The reversal of 73728666 is 66682737.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73728661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185986 + ... + 186381.

It is an arithmetic number, because the mean of its divisors is an integer number (7261176).

Almost surely, 2^73728666 is an apocalyptic number.

73728666 is an abundant number, since it is smaller than the sum of its proper divisors (100539558).

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

73728666 is a wasteful number, since it uses less digits than its factorization.

73728666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372386 (or 372383 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 73728666 is about 8586.5398153156. The cubic root of 73728666 is about 419.3198856664.

It can be divided in two parts, 737 and 28666, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 73728666 in words is "seventy-three million, seven hundred twenty-eight thousand, six hundred sixty-six".