64953666 has 48 divisors (see below), whose sum is σ = 148917600. Its totient is φ = 20404224.

The previous prime is 64953659. The next prime is 64953667. The reversal of 64953666 is 66635946.

It is not an unprimeable number, because it can be changed into a prime (64953667) 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, 87525 + ... + 88263.

It is an arithmetic number, because the mean of its divisors is an integer number (3102450).

Almost surely, 2^64953666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64953666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74458800).

64953666 is an abundant number, since it is smaller than the sum of its proper divisors (83963934).

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

64953666 is a wasteful number, since it uses less digits than its factorization.

64953666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 1020 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 64953666 is about 8059.3837233377. The cubic root of 64953666 is about 401.9770165816.

The spelling of 64953666 in words is "sixty-four million, nine hundred fifty-three thousand, six hundred sixty-six".