66914368 has 56 divisors (see below), whose sum is σ = 141914880. Its totient is φ = 31234560.

The previous prime is 66914357. The next prime is 66914381. The reversal of 66914368 is 86341966.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56955 + ... + 58117.

Almost surely, 2^66914368 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 66914368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70957440).

66914368 is an abundant number, since it is smaller than the sum of its proper divisors (75000512).

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

66914368 is a wasteful number, since it uses less digits than its factorization.

66914368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1225 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The square root of 66914368 is about 8180.1202925140. The cubic root of 66914368 is about 405.9817022014.

The spelling of 66914368 in words is "sixty-six million, nine hundred fourteen thousand, three hundred sixty-eight".