66117152071 has 4 divisors (see below), whose sum is σ = 69597002200. Its totient is φ = 62637301944.

The previous prime is 66117152053. The next prime is 66117152089. The reversal of 66117152071 is 17025171166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66117152053) and next prime (66117152089).

It is a cyclic number.

It is not a de Polignac number, because 66117152071 - 2¹³ = 66117143879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66117152071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66117152051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739925036 + ... + 1739925073.

It is an arithmetic number, because the mean of its divisors is an integer number (17399250550).

Almost surely, 2^66117152071 is an apocalyptic number.

66117152071 is a deficient number, since it is larger than the sum of its proper divisors (3479850129).

66117152071 is a wasteful number, since it uses less digits than its factorization.

66117152071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479850128.

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 66117152071 in words is "sixty-six billion, one hundred seventeen million, one hundred fifty-two thousand, seventy-one".