866940547 has 8 divisors (see below), whose sum is σ = 954431280. Its totient is φ = 780896160.

The previous prime is 866940523. The next prime is 866940559. The reversal of 866940547 is 745049668.

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

It is not a de Polignac number, because 866940547 - 2⁷ = 866940419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866940547.

It is not an unprimeable number, because it can be changed into a prime (866940647) 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, 360328 + ... + 362725.

It is an arithmetic number, because the mean of its divisors is an integer number (119303910).

Almost surely, 2^866940547 is an apocalyptic number.

866940547 is a deficient number, since it is larger than the sum of its proper divisors (87490733).

866940547 is a wasteful number, since it uses less digits than its factorization.

866940547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723173.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 866940547 is about 29443.8541464938. The cubic root of 866940547 is about 953.5199232827.

The spelling of 866940547 in words is "eight hundred sixty-six million, nine hundred forty thousand, five hundred forty-seven".