66540912 has 40 divisors (see below), whose sum is σ = 172191360. Its totient is φ = 22142400.

The previous prime is 66540899. The next prime is 66540913. The reversal of 66540912 is 21904566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66540913) 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, 49789 + ... + 51107.

It is an arithmetic number, because the mean of its divisors is an integer number (4304784).

Almost surely, 2^66540912 is an apocalyptic number.

It is an amenable number.

66540912 is an abundant number, since it is smaller than the sum of its proper divisors (105650448).

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

66540912 is a wasteful number, since it uses less digits than its factorization.

66540912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381 (or 2375 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 66540912 is about 8157.2613051195. The cubic root of 66540912 is about 405.2250174662.

The spelling of 66540912 in words is "sixty-six million, five hundred forty thousand, nine hundred twelve".