68654881 has 4 divisors (see below), whose sum is σ = 68889492. Its totient is φ = 68420272.

The previous prime is 68654843. The next prime is 68654897. The reversal of 68654881 is 18845686.

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 58675600 + 9979281 = 7660^2 + 3159^2 .

It is a cyclic number.

It is not a de Polignac number, because 68654881 - 2¹³ = 68646689 is a prime.

It is a super-2 number, since 2×68654881² = 9426985370248322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68654681) 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, 116866 + ... + 117451.

It is an arithmetic number, because the mean of its divisors is an integer number (17222373).

Almost surely, 2^68654881 is an apocalyptic number.

It is an amenable number.

68654881 is a deficient number, since it is larger than the sum of its proper divisors (234611).

68654881 is a wasteful number, since it uses less digits than its factorization.

68654881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234610.

The product of its digits is 368640, while the sum is 46.

The square root of 68654881 is about 8285.8240990260. The cubic root of 68654881 is about 409.4716195695.

The spelling of 68654881 in words is "sixty-eight million, six hundred fifty-four thousand, eight hundred eighty-one".