866804731 has 8 divisors (see below), whose sum is σ = 943971840. Its totient is φ = 791136192.

The previous prime is 866804713. The next prime is 866804737. The reversal of 866804731 is 137408668.

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 866804731 - 2⁹ = 866804219 is a prime.

It is a super-2 number, since 2×866804731² = 1502700883367964722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866804737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373435 + ... + 375748.

It is an arithmetic number, because the mean of its divisors is an integer number (117996480).

Almost surely, 2^866804731 is an apocalyptic number.

866804731 is a deficient number, since it is larger than the sum of its proper divisors (77167109).

866804731 is a wasteful number, since it uses less digits than its factorization.

866804731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749285.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 866804731 is about 29441.5477004861. The cubic root of 866804731 is about 953.4701274708.

The spelling of 866804731 in words is "eight hundred sixty-six million, eight hundred four thousand, seven hundred thirty-one".