51378766 has 8 divisors (see below), whose sum is σ = 77862960. Its totient is φ = 25424448.

The previous prime is 51378763. The next prime is 51378773. The reversal of 51378766 is 66787315.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51378763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132226 + ... + 132613.

It is an arithmetic number, because the mean of its divisors is an integer number (9732870).

Almost surely, 2^51378766 is an apocalyptic number.

51378766 is a deficient number, since it is larger than the sum of its proper divisors (26484194).

51378766 is a wasteful number, since it uses less digits than its factorization.

51378766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264938.

The product of its digits is 211680, while the sum is 43.

The square root of 51378766 is about 7167.8982972696. The cubic root of 51378766 is about 371.7587704554.

The spelling of 51378766 in words is "fifty-one million, three hundred seventy-eight thousand, seven hundred sixty-six".