68659551 has 6 divisors (see below), whose sum is σ = 99174920. Its totient is φ = 45773028.

The previous prime is 68659529. The next prime is 68659561. The reversal of 68659551 is 15595686.

It is a happy number.

68659551 is a `hidden beast` number, since 6 + 8 + 6 + 595 + 51 = 666.

It is not a de Polignac number, because 68659551 - 2¹⁴ = 68643167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68659497 and 68659506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68659561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3814411 + ... + 3814428.

Almost surely, 2^68659551 is an apocalyptic number.

68659551 is a deficient number, since it is larger than the sum of its proper divisors (30515369).

68659551 is a wasteful number, since it uses less digits than its factorization.

68659551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7628845 (or 7628842 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 68659551 is about 8286.1059008439. The cubic root of 68659551 is about 409.4809036343.

The spelling of 68659551 in words is "sixty-eight million, six hundred fifty-nine thousand, five hundred fifty-one".