66834512 has 40 divisors (see below), whose sum is σ = 134848512. Its totient is φ = 32054400.

The previous prime is 66834503. The next prime is 66834539. The reversal of 66834512 is 21543866.

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, 62462 + ... + 63522.

Almost surely, 2^66834512 is an apocalyptic number.

66834512 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66834512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67424256).

66834512 is an abundant number, since it is smaller than the sum of its proper divisors (68014000).

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

66834512 is a wasteful number, since it uses less digits than its factorization.

66834512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1221 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 66834512 is about 8175.2377335463. The cubic root of 66834512 is about 405.8201375972.

The spelling of 66834512 in words is "sixty-six million, eight hundred thirty-four thousand, five hundred twelve".