51806677 has 8 divisors (see below), whose sum is σ = 55906200. Its totient is φ = 47723520.

The previous prime is 51806669. The next prime is 51806681. The reversal of 51806677 is 77660815.

It can be written as a sum of positive squares in 4 ways, for example, as 2047761 + 49758916 = 1431^2 + 7054^2 .

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

It is not a de Polignac number, because 51806677 - 2³ = 51806669 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 (51806617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2949 + ... + 10597.

It is an arithmetic number, because the mean of its divisors is an integer number (6988275).

Almost surely, 2^51806677 is an apocalyptic number.

It is an amenable number.

51806677 is a deficient number, since it is larger than the sum of its proper divisors (4099523).

51806677 is a wasteful number, since it uses less digits than its factorization.

51806677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8183.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 51806677 is about 7197.6855307800. The cubic root of 51806677 is about 372.7879898329.

The spelling of 51806677 in words is "fifty-one million, eight hundred six thousand, six hundred seventy-seven".