866421357 has 8 divisors (see below), whose sum is σ = 1155501984. Its totient is φ = 577477488.

The previous prime is 866421289. The next prime is 866421383. The reversal of 866421357 is 753124668.

866421357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 866421357 - 2⁷ = 866421229 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866426357) 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, 18358 + ... + 45495.

It is an arithmetic number, because the mean of its divisors is an integer number (144437748).

Almost surely, 2^866421357 is an apocalyptic number.

It is an amenable number.

866421357 is a deficient number, since it is larger than the sum of its proper divisors (289080627).

866421357 is a wasteful number, since it uses less digits than its factorization.

866421357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68379.

The product of its digits is 241920, while the sum is 42.

The square root of 866421357 is about 29435.0362153676. The cubic root of 866421357 is about 953.3295384981.

The spelling of 866421357 in words is "eight hundred sixty-six million, four hundred twenty-one thousand, three hundred fifty-seven".