66822608 has 40 divisors (see below), whose sum is σ = 134515200. Its totient is φ = 32123520.

The previous prime is 66822599. The next prime is 66822617. The reversal of 66822608 is 80622866.

It is an interprime number because it is at equal distance from previous prime (66822599) and next prime (66822617).

It is a congruent 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, 98366 + ... + 99042.

It is an arithmetic number, because the mean of its divisors is an integer number (3362880).

Almost surely, 2^66822608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66822608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67257600).

66822608 is an abundant number, since it is smaller than the sum of its proper divisors (67692592).

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

66822608 is a wasteful number, since it uses less digits than its factorization.

66822608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 66822608 is about 8174.5096489025. The cubic root of 66822608 is about 405.7960424124.

The spelling of 66822608 in words is "sixty-six million, eight hundred twenty-two thousand, six hundred eight".