667487272747 has 4 divisors (see below), whose sum is σ = 667491836320. Its totient is φ = 667482709176.

The previous prime is 667487272741. The next prime is 667487272763. The reversal of 667487272747 is 747272784766.

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

It is a cyclic number.

It is not a de Polignac number, because 667487272747 - 2¹¹ = 667487270699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667487272741) 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, 2054868 + ... + 2357425.

It is an arithmetic number, because the mean of its divisors is an integer number (166872959080).

Almost surely, 2^667487272747 is an apocalyptic number.

667487272747 is a deficient number, since it is larger than the sum of its proper divisors (4563573).

667487272747 is a wasteful number, since it uses less digits than its factorization.

667487272747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563572.

The product of its digits is 309786624, while the sum is 67.

The spelling of 667487272747 in words is "six hundred sixty-seven billion, four hundred eighty-seven million, two hundred seventy-two thousand, seven hundred forty-seven".