66307462717 has 4 divisors (see below), whose sum is σ = 66307989340. Its totient is φ = 66306936096.

The previous prime is 66307462621. The next prime is 66307462729. The reversal of 66307462717 is 71726470366.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 33818842201 + 32488620516 = 183899^2 + 180246^2 .

It is a cyclic number.

It is not a de Polignac number, because 66307462717 - 2⁷ = 66307462589 is a prime.

It is a super-2 number, since 2×66307462717² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66307462747) 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, 49153 + ... + 367465.

It is an arithmetic number, because the mean of its divisors is an integer number (16576997335).

Almost surely, 2^66307462717 is an apocalyptic number.

It is an amenable number.

66307462717 is a deficient number, since it is larger than the sum of its proper divisors (526623).

66307462717 is a wasteful number, since it uses less digits than its factorization.

66307462717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526622.

The product of its (nonzero) digits is 1778112, while the sum is 49.

The spelling of 66307462717 in words is "sixty-six billion, three hundred seven million, four hundred sixty-two thousand, seven hundred seventeen".