51486766 has 4 divisors (see below), whose sum is σ = 77230152. Its totient is φ = 25743382.

The previous prime is 51486739. The next prime is 51486779. The reversal of 51486766 is 66768415.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12871690 + ... + 12871693.

It is an arithmetic number, because the mean of its divisors is an integer number (19307538).

Almost surely, 2^51486766 is an apocalyptic number.

51486766 is a deficient number, since it is larger than the sum of its proper divisors (25743386).

51486766 is a wasteful number, since it uses less digits than its factorization.

51486766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25743385.

The product of its digits is 241920, while the sum is 43.

The square root of 51486766 is about 7175.4279314895. The cubic root of 51486766 is about 372.0190715547.

The spelling of 51486766 in words is "fifty-one million, four hundred eighty-six thousand, seven hundred sixty-six".