51379666 has 8 divisors (see below), whose sum is σ = 82997964. Its totient is φ = 23713680.

The previous prime is 51379651. The next prime is 51379673. The reversal of 51379666 is 66697315.

It can be written as a sum of positive squares in 2 ways, for example, as 49999041 + 1380625 = 7071^2 + 1175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 988045 + ... + 988096.

Almost surely, 2^51379666 is an apocalyptic number.

51379666 is a deficient number, since it is larger than the sum of its proper divisors (31618298).

51379666 is a wasteful number, since it uses less digits than its factorization.

51379666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976156.

The product of its digits is 204120, while the sum is 43.

The square root of 51379666 is about 7167.9610769033. The cubic root of 51379666 is about 371.7609411378.

The spelling of 51379666 in words is "fifty-one million, three hundred seventy-nine thousand, six hundred sixty-six".