54697777866 has 48 divisors (see below), whose sum is σ = 125063858400. Its totient is φ = 17229430944.

The previous prime is 54697777817. The next prime is 54697777867. The reversal of 54697777866 is 66877779645.

It is a happy number.

54697777866 is a `hidden beast` number, since 546 + 9 + 7 + 7 + 7 + 78 + 6 + 6 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 54697777794 and 54697777803.

It is not an unprimeable number, because it can be changed into a prime (54697777867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65656 + ... + 337203.

It is an arithmetic number, because the mean of its divisors is an integer number (2605497050).

Almost surely, 2^54697777866 is an apocalyptic number.

54697777866 is an abundant number, since it is smaller than the sum of its proper divisors (70366080534).

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

54697777866 is a wasteful number, since it uses less digits than its factorization.

54697777866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403283 (or 403280 counting only the distinct ones).

The product of its digits is 746807040, while the sum is 72.

The spelling of 54697777866 in words is "fifty-four billion, six hundred ninety-seven million, seven hundred seventy-seven thousand, eight hundred sixty-six".