66670240 has 192 divisors, whose sum is σ = 204906240. Its totient is φ = 19906560.

The previous prime is 66670213. The next prime is 66670267. The reversal of 66670240 is 4207666.

It is an interprime number because it is at equal distance from previous prime (66670213) and next prime (66670267).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276520 + ... + 276760.

It is an arithmetic number, because the mean of its divisors is an integer number (1067220).

Almost surely, 2^66670240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66670240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102453120).

66670240 is an abundant number, since it is smaller than the sum of its proper divisors (138236000).

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

66670240 is a wasteful number, since it uses less digits than its factorization.

66670240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 66670240 is about 8165.1846274288. The cubic root of 66670240 is about 405.4873774872.

The spelling of 66670240 in words is "sixty-six million, six hundred seventy thousand, two hundred forty".