77686485 has 8 divisors (see below), whose sum is σ = 124298400. Its totient is φ = 41432784.

The previous prime is 77686471. The next prime is 77686487. The reversal of 77686485 is 58468677.

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

It is not a de Polignac number, because 77686485 - 2¹² = 77682389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77686487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2589535 + ... + 2589564.

It is an arithmetic number, because the mean of its divisors is an integer number (15537300).

Almost surely, 2^77686485 is an apocalyptic number.

It is an amenable number.

77686485 is a deficient number, since it is larger than the sum of its proper divisors (46611915).

77686485 is a wasteful number, since it uses less digits than its factorization.

77686485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179107.

The product of its digits is 2257920, while the sum is 51.

The square root of 77686485 is about 8813.9937031972. The cubic root of 77686485 is about 426.6926453773.

The spelling of 77686485 in words is "seventy-seven million, six hundred eighty-six thousand, four hundred eighty-five".