51778677 has 8 divisors (see below), whose sum is σ = 69072480. Its totient is φ = 34502000.

The previous prime is 51778673. The next prime is 51778693. The reversal of 51778677 is 77687715.

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 51778677 - 2² = 51778673 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51778673) 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, 7099 + ... + 12407.

It is an arithmetic number, because the mean of its divisors is an integer number (8634060).

Almost surely, 2^51778677 is an apocalyptic number.

It is an amenable number.

51778677 is a deficient number, since it is larger than the sum of its proper divisors (17293803).

51778677 is a wasteful number, since it uses less digits than its factorization.

51778677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563.

The product of its digits is 576240, while the sum is 48.

The square root of 51778677 is about 7195.7401982006. The cubic root of 51778677 is about 372.7208173796.

The spelling of 51778677 in words is "fifty-one million, seven hundred seventy-eight thousand, six hundred seventy-seven".