66331140 has 24 divisors (see below), whose sum is σ = 185727360. Its totient is φ = 17688288.

The previous prime is 66331099. The next prime is 66331151. The reversal of 66331140 is 4113366.

It is a super-6 number, since 6×66331140⁶ (a number of 48 digits) contains 666666 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66331140.

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, 552700 + ... + 552819.

It is an arithmetic number, because the mean of its divisors is an integer number (7738640).

Almost surely, 2^66331140 is an apocalyptic number.

66331140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66331140 is an abundant number, since it is smaller than the sum of its proper divisors (119396220).

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

66331140 is a wasteful number, since it uses less digits than its factorization.

66331140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105531 (or 1105529 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 66331140 is about 8144.3931633977. The cubic root of 66331140 is about 404.7987416444.

The spelling of 66331140 in words is "sixty-six million, three hundred thirty-one thousand, one hundred forty".