66232540 has 24 divisors (see below), whose sum is σ = 151733232. Its totient is φ = 24084480.

The previous prime is 66232511. The next prime is 66232597. The reversal of 66232540 is 4523266.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66232499 and 66232508.

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, 150309 + ... + 150748.

It is an arithmetic number, because the mean of its divisors is an integer number (6322218).

Almost surely, 2^66232540 is an apocalyptic number.

It is an amenable number.

66232540 is an abundant number, since it is smaller than the sum of its proper divisors (85500692).

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

66232540 is a wasteful number, since it uses less digits than its factorization.

66232540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301077 (or 301075 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 66232540 is about 8138.3376680991. The cubic root of 66232540 is about 404.5980669236.

The spelling of 66232540 in words is "sixty-six million, two hundred thirty-two thousand, five hundred forty".