66097140 has 24 divisors (see below), whose sum is σ = 185072160. Its totient is φ = 17625888.

The previous prime is 66097121. The next prime is 66097153. The reversal of 66097140 is 4179066.

It is a happy number.

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, 550750 + ... + 550869.

It is an arithmetic number, because the mean of its divisors is an integer number (7711340).

Almost surely, 2^66097140 is an apocalyptic number.

66097140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66097140 is an abundant number, since it is smaller than the sum of its proper divisors (118975020).

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

66097140 is a wasteful number, since it uses less digits than its factorization.

66097140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101631 (or 1101629 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 66097140 is about 8130.0147601342. The cubic root of 66097140 is about 404.3221705560.

The spelling of 66097140 in words is "sixty-six million, ninety-seven thousand, one hundred forty".