2668149851 has 4 divisors (see below), whose sum is σ = 2692628400. Its totient is φ = 2643671304.

The previous prime is 2668149823. The next prime is 2668149853. The reversal of 2668149851 is 1589418662.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2668149851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2668149851.

It is not an unprimeable number, because it can be changed into a prime (2668149853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12239111 + ... + 12239328.

It is an arithmetic number, because the mean of its divisors is an integer number (673157100).

Almost surely, 2^2668149851 is an apocalyptic number.

2668149851 is a deficient number, since it is larger than the sum of its proper divisors (24478549).

2668149851 is a wasteful number, since it uses less digits than its factorization.

2668149851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24478548.

The product of its digits is 829440, while the sum is 50.

The square root of 2668149851 is about 51654.1368236853. The cubic root of 2668149851 is about 1386.9795966958.

The spelling of 2668149851 in words is "two billion, six hundred sixty-eight million, one hundred forty-nine thousand, eight hundred fifty-one".