68140651 has 4 divisors (see below), whose sum is σ = 71103312. Its totient is φ = 65177992.

The previous prime is 68140637. The next prime is 68140661. The reversal of 68140651 is 15604186.

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 68140651 - 2⁵ = 68140619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68140601) 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, 1481296 + ... + 1481341.

It is an arithmetic number, because the mean of its divisors is an integer number (17775828).

Almost surely, 2^68140651 is an apocalyptic number.

68140651 is a deficient number, since it is larger than the sum of its proper divisors (2962661).

68140651 is a wasteful number, since it uses less digits than its factorization.

68140651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962660.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 68140651 is about 8254.7350654034. The cubic root of 68140651 is about 408.4467325012.

The spelling of 68140651 in words is "sixty-eight million, one hundred forty thousand, six hundred fifty-one".