51765677 has 4 divisors (see below), whose sum is σ = 51780636. Its totient is φ = 51750720.

The previous prime is 51765661. The next prime is 51765713. The reversal of 51765677 is 77656715.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26020201 + 25745476 = 5101^2 + 5074^2 .

It is a cyclic number.

It is not a de Polignac number, because 51765677 - 2⁴ = 51765661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51765277) 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, 677 + ... + 10197.

It is an arithmetic number, because the mean of its divisors is an integer number (12945159).

Almost surely, 2^51765677 is an apocalyptic number.

It is an amenable number.

51765677 is a deficient number, since it is larger than the sum of its proper divisors (14959).

51765677 is an equidigital number, since it uses as much as digits as its factorization.

51765677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14958.

The product of its digits is 308700, while the sum is 44.

The square root of 51765677 is about 7194.8368292825. The cubic root of 51765677 is about 372.6896219373.

The spelling of 51765677 in words is "fifty-one million, seven hundred sixty-five thousand, six hundred seventy-seven".