66807028 has 12 divisors (see below), whose sum is σ = 117240480. Its totient is φ = 33309752.

The previous prime is 66807023. The next prime is 66807029. The reversal of 66807028 is 82070866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66807023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21826 + ... + 24697.

It is an arithmetic number, because the mean of its divisors is an integer number (9770040).

Almost surely, 2^66807028 is an apocalyptic number.

It is an amenable number.

66807028 is a deficient number, since it is larger than the sum of its proper divisors (50433452).

66807028 is a wasteful number, since it uses less digits than its factorization.

66807028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46886 (or 46884 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 66807028 is about 8173.5566309900. The cubic root of 66807028 is about 405.7645022199.

The spelling of 66807028 in words is "sixty-six million, eight hundred seven thousand, twenty-eight".