681877606 has 4 divisors (see below), whose sum is σ = 1022816412. Its totient is φ = 340938802.

The previous prime is 681877579. The next prime is 681877621. The reversal of 681877606 is 606778186.

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

It is a self number, because there is not a number n which added to its sum of digits gives 681877606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170469400 + ... + 170469403.

It is an arithmetic number, because the mean of its divisors is an integer number (255704103).

Almost surely, 2^681877606 is an apocalyptic number.

681877606 is a deficient number, since it is larger than the sum of its proper divisors (340938806).

681877606 is a wasteful number, since it uses less digits than its factorization.

681877606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340938805.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 681877606 is about 26112.7862550131. The cubic root of 681877606 is about 880.1745547329.

The spelling of 681877606 in words is "six hundred eighty-one million, eight hundred seventy-seven thousand, six hundred six".