686887377 has 8 divisors (see below), whose sum is σ = 999108960. Its totient is φ = 416295360.

The previous prime is 686887349. The next prime is 686887427. The reversal of 686887377 is 773788686.

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

It is not a de Polignac number, because 686887377 - 2¹⁶ = 686821841 is a prime.

It is a super-3 number, since 3×686887377³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686887377.

It is not an unprimeable number, because it can be changed into a prime (686887177) 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, 10407352 + ... + 10407417.

It is an arithmetic number, because the mean of its divisors is an integer number (124888620).

Almost surely, 2^686887377 is an apocalyptic number.

It is an amenable number.

686887377 is a deficient number, since it is larger than the sum of its proper divisors (312221583).

686887377 is a wasteful number, since it uses less digits than its factorization.

686887377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20814783.

The product of its digits is 18966528, while the sum is 60.

The square root of 686887377 is about 26208.5363383765. The cubic root of 686887377 is about 882.3248516723.

The spelling of 686887377 in words is "six hundred eighty-six million, eight hundred eighty-seven thousand, three hundred seventy-seven".