872666647 has 8 divisors (see below), whose sum is σ = 901210752. Its totient is φ = 844147200.

The previous prime is 872666633. The next prime is 872666653. The reversal of 872666647 is 746666278.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 872666647 - 2⁷ = 872666519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 872666594 and 872666603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872666687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89643 + ... + 98899.

It is an arithmetic number, because the mean of its divisors is an integer number (112651344).

Almost surely, 2^872666647 is an apocalyptic number.

872666647 is a deficient number, since it is larger than the sum of its proper divisors (28544105).

872666647 is a wasteful number, since it uses less digits than its factorization.

872666647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12329.

The product of its digits is 4064256, while the sum is 52.

The square root of 872666647 is about 29540.9317219346. The cubic root of 872666647 is about 955.6146357233.

The spelling of 872666647 in words is "eight hundred seventy-two million, six hundred sixty-six thousand, six hundred forty-seven".