811866346 has 4 divisors (see below), whose sum is σ = 1217799522. Its totient is φ = 405933172.

The previous prime is 811866323. The next prime is 811866401. The reversal of 811866346 is 643668118.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 594628225 + 217238121 = 24385^2 + 14739^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202966585 + ... + 202966588.

Almost surely, 2^811866346 is an apocalyptic number.

811866346 is a deficient number, since it is larger than the sum of its proper divisors (405933176).

811866346 is a wasteful number, since it uses less digits than its factorization.

811866346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405933175.

The product of its digits is 165888, while the sum is 43.

The square root of 811866346 is about 28493.2684330878. The cubic root of 811866346 is about 932.8851496423.

The spelling of 811866346 in words is "eight hundred eleven million, eight hundred sixty-six thousand, three hundred forty-six".