64422666 has 96 divisors (see below), whose sum is σ = 177510528. Its totient is φ = 16398720.

The previous prime is 64422629. The next prime is 64422697. The reversal of 64422666 is 66622446.

It is a self number, because there is not a number n which added to its sum of digits gives 64422666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73020 + ... + 73896.

It is an arithmetic number, because the mean of its divisors is an integer number (1849068).

Almost surely, 2^64422666 is an apocalyptic number.

64422666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64422666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88755264).

64422666 is an abundant number, since it is smaller than the sum of its proper divisors (113087862).

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

64422666 is a wasteful number, since it uses less digits than its factorization.

64422666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 953 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 64422666 is about 8026.3731535482. The cubic root of 64422666 is about 400.8786228085.

The spelling of 64422666 in words is "sixty-four million, four hundred twenty-two thousand, six hundred sixty-six".