66417252207 has 16 divisors (see below), whose sum is σ = 93342716160. Its totient is φ = 41891254272.

The previous prime is 66417252203. The next prime is 66417252271. The reversal of 66417252207 is 70225271466.

It is not a de Polignac number, because 66417252207 - 2² = 66417252203 is a prime.

It is a super-2 number, since 2×66417252207² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66417252203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741778 + ... + 826479.

It is an arithmetic number, because the mean of its divisors is an integer number (5833919760).

Almost surely, 2^66417252207 is an apocalyptic number.

66417252207 is a deficient number, since it is larger than the sum of its proper divisors (26925463953).

66417252207 is a wasteful number, since it uses less digits than its factorization.

66417252207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569022.

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 66417252207 in words is "sixty-six billion, four hundred seventeen million, two hundred fifty-two thousand, two hundred seven".