68669557 has 12 divisors (see below), whose sum is σ = 77918848. Its totient is φ = 60409800.

The previous prime is 68669551. The next prime is 68669561. The reversal of 68669557 is 75596686.

It is not a de Polignac number, because 68669557 - 2⁷ = 68669429 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 (68669551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5403 + ... + 12904.

Almost surely, 2^68669557 is an apocalyptic number.

It is an amenable number.

68669557 is a deficient number, since it is larger than the sum of its proper divisors (9249291).

68669557 is a wasteful number, since it uses less digits than its factorization.

68669557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18360 (or 18349 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 52.

The square root of 68669557 is about 8286.7096606554. The cubic root of 68669557 is about 409.5007943698.

The spelling of 68669557 in words is "sixty-eight million, six hundred sixty-nine thousand, five hundred fifty-seven".