66822867 has 16 divisors (see below), whose sum is σ = 104208000. Its totient is φ = 42203592.

The previous prime is 66822859. The next prime is 66822883. The reversal of 66822867 is 76822866.

It is a happy number.

It is not a de Polignac number, because 66822867 - 2³ = 66822859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66822167) 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 15 ways as a sum of consecutive naturals, for example, 64617 + ... + 65642.

It is an arithmetic number, because the mean of its divisors is an integer number (6513000).

Almost surely, 2^66822867 is an apocalyptic number.

66822867 is a deficient number, since it is larger than the sum of its proper divisors (37385133).

66822867 is a wasteful number, since it uses less digits than its factorization.

66822867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130287 (or 130281 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 66822867 is about 8174.5254908160. The cubic root of 66822867 is about 405.7965666912.

Subtracting 66822867 from its reverse (76822866), we obtain a palindrome (9999999).

The spelling of 66822867 in words is "sixty-six million, eight hundred twenty-two thousand, eight hundred sixty-seven".