51724242666 has 12 divisors (see below), whose sum is σ = 112069192482. Its totient is φ = 17241414216.

The previous prime is 51724242643. The next prime is 51724242677. The reversal of 51724242666 is 66624242715.

It can be written as a sum of positive squares in only one way, i.e., 44741133441 + 6983109225 = 211521^2 + 83565^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1436784501 + ... + 1436784536.

Almost surely, 2^51724242666 is an apocalyptic number.

51724242666 is an abundant number, since it is smaller than the sum of its proper divisors (60344949816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51724242666 is a wasteful number, since it uses less digits than its factorization.

51724242666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873569045 (or 2873569042 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 51724242666 in words is "fifty-one billion, seven hundred twenty-four million, two hundred forty-two thousand, six hundred sixty-six".