68677581 has 16 divisors (see below), whose sum is σ = 105283584. Its totient is φ = 39007344.

The previous prime is 68677577. The next prime is 68677607. The reversal of 68677581 is 18577686.

It is not a de Polignac number, because 68677581 - 2² = 68677577 is a prime.

It is a super-2 number, since 2×68677581² = 9433220264023122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68677581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68677541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6285 + ... + 13298.

It is an arithmetic number, because the mean of its divisors is an integer number (6580224).

Almost surely, 2^68677581 is an apocalyptic number.

It is an amenable number.

68677581 is a deficient number, since it is larger than the sum of its proper divisors (36606003).

68677581 is a wasteful number, since it uses less digits than its factorization.

68677581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19760.

The product of its digits is 564480, while the sum is 48.

The square root of 68677581 is about 8287.1937952482. The cubic root of 68677581 is about 409.5167437295.

The spelling of 68677581 in words is "sixty-eight million, six hundred seventy-seven thousand, five hundred eighty-one".