66257295207 has 8 divisors (see below), whose sum is σ = 88369003776. Its totient is φ = 44158558392.

The previous prime is 66257295179. The next prime is 66257295217. The reversal of 66257295207 is 70259275266.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66257295207 - 2¹¹ = 66257293159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66257295207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66257295217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3231013 + ... + 3251454.

It is an arithmetic number, because the mean of its divisors is an integer number (11046125472).

Almost surely, 2^66257295207 is an apocalyptic number.

66257295207 is a deficient number, since it is larger than the sum of its proper divisors (22111708569).

66257295207 is a wasteful number, since it uses less digits than its factorization.

66257295207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485877.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 66257295207 in words is "sixty-six billion, two hundred fifty-seven million, two hundred ninety-five thousand, two hundred seven".