66171028 has 36 divisors (see below), whose sum is σ = 145474336. Its totient is φ = 25779600.

The previous prime is 66170989. The next prime is 66171067. The reversal of 66171028 is 82017166.

66171028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66170989) and next prime (66171067).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6378 + ... + 13153.

Almost surely, 2^66171028 is an apocalyptic number.

It is an amenable number.

66171028 is an abundant number, since it is smaller than the sum of its proper divisors (79303308).

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

66171028 is a wasteful number, since it uses less digits than its factorization.

66171028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19564 (or 19551 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 66171028 is about 8134.5576400933. The cubic root of 66171028 is about 404.4727743062.

The spelling of 66171028 in words is "sixty-six million, one hundred seventy-one thousand, twenty-eight".