66999122 has 16 divisors (see below), whose sum is σ = 104416512. Its totient is φ = 32207760.

The previous prime is 66999113. The next prime is 66999133. The reversal of 66999122 is 22199966.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6293 + ... + 13175.

It is an arithmetic number, because the mean of its divisors is an integer number (6526032).

Almost surely, 2^66999122 is an apocalyptic number.

66999122 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66999122 is a deficient number, since it is larger than the sum of its proper divisors (37417390).

66999122 is a wasteful number, since it uses less digits than its factorization.

66999122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7073.

The product of its digits is 104976, while the sum is 44.

The square root of 66999122 is about 8185.2991393107. The cubic root of 66999122 is about 406.1530358879.

The spelling of 66999122 in words is "sixty-six million, nine hundred ninety-nine thousand, one hundred twenty-two".