68674561 has 4 divisors (see below), whose sum is σ = 68704324. Its totient is φ = 68644800.

The previous prime is 68674559. The next prime is 68674589. The reversal of 68674561 is 16547686.

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 2 ways, for example, as 33640000 + 35034561 = 5800^2 + 5919^2 .

It is a cyclic number.

It is not a de Polignac number, because 68674561 - 2¹ = 68674559 is a prime.

It is a super-3 number, since 3×68674561³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68674861) 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, 11100 + ... + 16141.

It is an arithmetic number, because the mean of its divisors is an integer number (17176081).

Almost surely, 2^68674561 is an apocalyptic number.

It is an amenable number.

68674561 is a deficient number, since it is larger than the sum of its proper divisors (29763).

68674561 is a wasteful number, since it uses less digits than its factorization.

68674561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29762.

The product of its digits is 241920, while the sum is 43.

The square root of 68674561 is about 8287.0115844012. The cubic root of 68674561 is about 409.5107410007.

The spelling of 68674561 in words is "sixty-eight million, six hundred seventy-four thousand, five hundred sixty-one".