681057658 has 8 divisors (see below), whose sum is σ = 1026087552. Its totient is φ = 339028476.

The previous prime is 681057653. The next prime is 681057659. The reversal of 681057658 is 856750186.

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

It is not an unprimeable number, because it can be changed into a prime (681057653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749610 + ... + 750517.

It is an arithmetic number, because the mean of its divisors is an integer number (128260944).

Almost surely, 2^681057658 is an apocalyptic number.

681057658 is a deficient number, since it is larger than the sum of its proper divisors (345029894).

681057658 is a wasteful number, since it uses less digits than its factorization.

681057658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500356.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 681057658 is about 26097.0814076977. The cubic root of 681057658 is about 879.8216141516.

The spelling of 681057658 in words is "six hundred eighty-one million, fifty-seven thousand, six hundred fifty-eight".