74666656851 has 4 divisors (see below), whose sum is σ = 99555542472. Its totient is φ = 49777771232.

The previous prime is 74666656843. The next prime is 74666656871. The reversal of 74666656851 is 15865666647.

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 74666656851 - 2³ = 74666656843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74666656871) 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, 12444442806 + ... + 12444442811.

It is an arithmetic number, because the mean of its divisors is an integer number (24888885618).

Almost surely, 2^74666656851 is an apocalyptic number.

74666656851 is a deficient number, since it is larger than the sum of its proper divisors (24888885621).

74666656851 is a wasteful number, since it uses less digits than its factorization.

74666656851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24888885620.

The product of its digits is 43545600, while the sum is 60.

The spelling of 74666656851 in words is "seventy-four billion, six hundred sixty-six million, six hundred fifty-six thousand, eight hundred fifty-one".