66622000 has 40 divisors (see below), whose sum is σ = 161096832. Its totient is φ = 26648000.

The previous prime is 66621991. The next prime is 66622001. The reversal of 66622000 is 22666.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66622001) 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, 14656 + ... + 18655.

Almost surely, 2^66622000 is an apocalyptic number.

It is an amenable number.

66622000 is an abundant number, since it is smaller than the sum of its proper divisors (94474832).

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

66622000 is a wasteful number, since it uses less digits than its factorization.

66622000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33334 (or 33318 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66622000 is about 8162.2300874210. The cubic root of 66622000 is about 405.3895555765.

Adding to 66622000 its reverse (22666), we get a palindrome (66644666).

The spelling of 66622000 in words is "sixty-six million, six hundred twenty-two thousand".