66822406 has 16 divisors (see below), whose sum is σ = 119533824. Its totient is φ = 27392904.

The previous prime is 66822403. The next prime is 66822419. The reversal of 66822406 is 60422866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66822401) 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, 103440 + ... + 104083.

It is an arithmetic number, because the mean of its divisors is an integer number (7470864).

Almost surely, 2^66822406 is an apocalyptic number.

66822406 is a deficient number, since it is larger than the sum of its proper divisors (52711418).

66822406 is a wasteful number, since it uses less digits than its factorization.

66822406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207555.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 66822406 is about 8174.4972934120. The cubic root of 66822406 is about 405.7956335144.

The spelling of 66822406 in words is "sixty-six million, eight hundred twenty-two thousand, four hundred six".