866862405 has 24 divisors (see below), whose sum is σ = 1558214112. Its totient is φ = 462325968.

The previous prime is 866862383. The next prime is 866862421. The reversal of 866862405 is 504268668.

866862405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866862405 - 2¹⁶ = 866796869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355519 + ... + 357948.

It is an arithmetic number, because the mean of its divisors is an integer number (64925588).

Almost surely, 2^866862405 is an apocalyptic number.

It is an amenable number.

866862405 is a deficient number, since it is larger than the sum of its proper divisors (691351707).

866862405 is an equidigital number, since it uses as much as digits as its factorization.

866862405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713487 (or 713475 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 866862405 is about 29442.5271503653. The cubic root of 866862405 is about 953.4912738008.

The spelling of 866862405 in words is "eight hundred sixty-six million, eight hundred sixty-two thousand, four hundred five".