66526064 has 40 divisors (see below), whose sum is σ = 141419520. Its totient is φ = 30065600.

The previous prime is 66526039. The next prime is 66526069. The reversal of 66526064 is 46062566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66526069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32627 + ... + 34605.

It is an arithmetic number, because the mean of its divisors is an integer number (3535488).

Almost surely, 2^66526064 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 66526064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70709760).

66526064 is an abundant number, since it is smaller than the sum of its proper divisors (74893456).

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

66526064 is a wasteful number, since it uses less digits than its factorization.

66526064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66526064 is about 8156.3511449667. The cubic root of 66526064 is about 405.1948744636.

The spelling of 66526064 in words is "sixty-six million, five hundred twenty-six thousand, sixty-four".