68668477 has 4 divisors (see below), whose sum is σ = 69089920. Its totient is φ = 68247036.

The previous prime is 68668429. The next prime is 68668513. The reversal of 68668477 is 77486686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68668477 - 2¹⁵ = 68635709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68668417) 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, 210477 + ... + 210802.

It is an arithmetic number, because the mean of its divisors is an integer number (17272480).

Almost surely, 2^68668477 is an apocalyptic number.

It is an amenable number.

68668477 is a deficient number, since it is larger than the sum of its proper divisors (421443).

68668477 is a wasteful number, since it uses less digits than its factorization.

68668477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421442.

The product of its digits is 2709504, while the sum is 52.

The square root of 68668477 is about 8286.6444958137. The cubic root of 68668477 is about 409.4986475516.

The spelling of 68668477 in words is "sixty-eight million, six hundred sixty-eight thousand, four hundred seventy-seven".