51011766 has 48 divisors (see below), whose sum is σ = 119608944. Its totient is φ = 15619392.

The previous prime is 51011761. The next prime is 51011777. The reversal of 51011766 is 66711015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64425 + ... + 65211.

It is an arithmetic number, because the mean of its divisors is an integer number (2491853).

Almost surely, 2^51011766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51011766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59804472).

51011766 is an abundant number, since it is smaller than the sum of its proper divisors (68597178).

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

51011766 is a wasteful number, since it uses less digits than its factorization.

51011766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51011766 is about 7142.2521658088. The cubic root of 51011766 is about 370.8714932858.

The spelling of 51011766 in words is "fifty-one million, eleven thousand, seven hundred sixty-six".