51666677 has 8 divisors (see below), whose sum is σ = 54469632. Its totient is φ = 48934800.

The previous prime is 51666649. The next prime is 51666707. The reversal of 51666677 is 77666615.

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

It is a cyclic number.

It is not a de Polignac number, because 51666677 - 2¹⁴ = 51650293 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 (51666617) 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, 16274 + ... + 19187.

It is an arithmetic number, because the mean of its divisors is an integer number (6808704).

Almost surely, 2^51666677 is an apocalyptic number.

It is an amenable number.

51666677 is a deficient number, since it is larger than the sum of its proper divisors (2802955).

51666677 is a wasteful number, since it uses less digits than its factorization.

51666677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35539.

The product of its digits is 317520, while the sum is 44.

The square root of 51666677 is about 7187.9536030779. The cubic root of 51666677 is about 372.4518851416.

The spelling of 51666677 in words is "fifty-one million, six hundred sixty-six thousand, six hundred seventy-seven".