68006651 has 4 divisors (see below), whose sum is σ = 68137704. Its totient is φ = 67875600.

The previous prime is 68006639. The next prime is 68006657. The reversal of 68006651 is 15660086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68006651 - 2²² = 63812347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68006657) 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, 64745 + ... + 65786.

It is an arithmetic number, because the mean of its divisors is an integer number (17034426).

Almost surely, 2^68006651 is an apocalyptic number.

68006651 is a deficient number, since it is larger than the sum of its proper divisors (131053).

68006651 is a wasteful number, since it uses less digits than its factorization.

68006651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131052.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 68006651 is about 8246.6145174853. The cubic root of 68006651 is about 408.1788171540.

The spelling of 68006651 in words is "sixty-eight million, six thousand, six hundred fifty-one".