694819866 has 64 divisors (see below), whose sum is σ = 1543401216. Its totient is φ = 207168000.

The previous prime is 694819859. The next prime is 694819871. The reversal of 694819866 is 668918496.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 533416 + ... + 534716.

It is an arithmetic number, because the mean of its divisors is an integer number (24115644).

Almost surely, 2^694819866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 694819866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771700608).

694819866 is an abundant number, since it is smaller than the sum of its proper divisors (848581350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

694819866 is a wasteful number, since it uses less digits than its factorization.

694819866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527.

The product of its digits is 4478976, while the sum is 57.

The square root of 694819866 is about 26359.4359954837. The cubic root of 694819866 is about 885.7083568777.

The spelling of 694819866 in words is "six hundred ninety-four million, eight hundred nineteen thousand, eight hundred sixty-six".