66728094 has 32 divisors (see below), whose sum is σ = 145133856. Its totient is φ = 20367360.

The previous prime is 66728093. The next prime is 66728147. The reversal of 66728094 is 49082766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66728093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5067 + ... + 12614.

It is an arithmetic number, because the mean of its divisors is an integer number (4535433).

Almost surely, 2^66728094 is an apocalyptic number.

66728094 is an abundant number, since it is smaller than the sum of its proper divisors (78405762).

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

66728094 is a wasteful number, since it uses less digits than its factorization.

66728094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17740.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 66728094 is about 8168.7265837461. The cubic root of 66728094 is about 405.6046326241.

The spelling of 66728094 in words is "sixty-six million, seven hundred twenty-eight thousand, ninety-four".