66622410 has 48 divisors (see below), whose sum is σ = 178813440. Its totient is φ = 17192160.

The previous prime is 66622399. The next prime is 66622411. The reversal of 66622410 is 1422666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66622411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9150 + ... + 14729.

It is an arithmetic number, because the mean of its divisors is an integer number (3725280).

Almost surely, 2^66622410 is an apocalyptic number.

66622410 is an abundant number, since it is smaller than the sum of its proper divisors (112191030).

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

66622410 is a wasteful number, since it uses less digits than its factorization.

66622410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23923 (or 23920 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66622410 is about 8162.2552030673. The cubic root of 66622410 is about 405.3903871806.

The spelling of 66622410 in words is "sixty-six million, six hundred twenty-two thousand, four hundred ten".