66801828 has 24 divisors (see below), whose sum is σ = 156171232. Its totient is φ = 22224384.

The previous prime is 66801817. The next prime is 66801829. The reversal of 66801828 is 82810866.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66801829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476 + ... + 11652.

Almost surely, 2^66801828 is an apocalyptic number.

It is an amenable number.

66801828 is an abundant number, since it is smaller than the sum of its proper divisors (89369404).

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

66801828 is a wasteful number, since it uses less digits than its factorization.

66801828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10731 (or 10729 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 66801828 is about 8173.2385258232. The cubic root of 66801828 is about 405.7539742349.

The spelling of 66801828 in words is "sixty-six million, eight hundred one thousand, eight hundred twenty-eight".