66140052 has 96 divisors (see below), whose sum is σ = 175609728. Its totient is φ = 19360000.

The previous prime is 66140033. The next prime is 66140069. The reversal of 66140052 is 25004166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654802 + ... + 654902.

It is an arithmetic number, because the mean of its divisors is an integer number (1829268).

Almost surely, 2^66140052 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 66140052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87804864).

66140052 is an abundant number, since it is smaller than the sum of its proper divisors (109469676).

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

66140052 is a wasteful number, since it uses less digits than its factorization.

66140052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 66140052 is about 8132.6534415282. The cubic root of 66140052 is about 404.4096504862.

The spelling of 66140052 in words is "sixty-six million, one hundred forty thousand, fifty-two".