51740866 has 4 divisors (see below), whose sum is σ = 77611302. Its totient is φ = 25870432.

The previous prime is 51740863. The next prime is 51740873. The reversal of 51740866 is 66804715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66804715 = 5 ⋅13360943.

It can be written as a sum of positive squares in only one way, i.e., 32160241 + 19580625 = 5671^2 + 4425^2 .

It is not an unprimeable number, because it can be changed into a prime (51740861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935215 + ... + 12935218.

Almost surely, 2^51740866 is an apocalyptic number.

51740866 is a deficient number, since it is larger than the sum of its proper divisors (25870436).

51740866 is a wasteful number, since it uses less digits than its factorization.

51740866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25870435.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 51740866 is about 7193.1124000672. The cubic root of 51740866 is about 372.6300697369.

The spelling of 51740866 in words is "fifty-one million, seven hundred forty thousand, eight hundred sixty-six".