76686849 has 6 divisors (see below), whose sum is σ = 110769906. Its totient is φ = 51124560.

The previous prime is 76686823. The next prime is 76686917. The reversal of 76686849 is 94868667.

It can be written as a sum of positive squares in only one way, i.e., 62489025 + 14197824 = 7905^2 + 3768^2 .

It is not a de Polignac number, because 76686849 - 2⁷ = 76686721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 76686795 and 76686804.

It is not an unprimeable number, because it can be changed into a prime (76686809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4260372 + ... + 4260389.

It is an arithmetic number, because the mean of its divisors is an integer number (18461651).

Almost surely, 2^76686849 is an apocalyptic number.

It is an amenable number.

76686849 is a deficient number, since it is larger than the sum of its proper divisors (34083057).

76686849 is a wasteful number, since it uses less digits than its factorization.

76686849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8520767 (or 8520764 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 76686849 is about 8757.1027743198. The cubic root of 76686849 is about 424.8545735424.

The spelling of 76686849 in words is "seventy-six million, six hundred eighty-six thousand, eight hundred forty-nine".