66140468 has 12 divisors (see below), whose sum is σ = 118208832. Its totient is φ = 32366520.

The previous prime is 66140461. The next prime is 66140471. The reversal of 66140468 is 86404166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66140461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175718 + ... + 176093.

It is an arithmetic number, because the mean of its divisors is an integer number (9850736).

Almost surely, 2^66140468 is an apocalyptic number.

It is an amenable number.

66140468 is a deficient number, since it is larger than the sum of its proper divisors (52068364).

66140468 is a wasteful number, since it uses less digits than its factorization.

66140468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351862 (or 351860 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 66140468 is about 8132.6790173964. The cubic root of 66140468 is about 404.4104983540.

The spelling of 66140468 in words is "sixty-six million, one hundred forty thousand, four hundred sixty-eight".