686763066 has 16 divisors (see below), whose sum is σ = 1498392288. Its totient is φ = 208110000.

The previous prime is 686763061. The next prime is 686763101. The reversal of 686763066 is 660367686.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (686763061) 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, 5202685 + ... + 5202816.

It is an arithmetic number, because the mean of its divisors is an integer number (93649518).

Almost surely, 2^686763066 is an apocalyptic number.

686763066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

686763066 is an abundant number, since it is smaller than the sum of its proper divisors (811629222).

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

686763066 is a wasteful number, since it uses less digits than its factorization.

686763066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10405517.

The product of its (nonzero) digits is 1306368, while the sum is 48.

The square root of 686763066 is about 26206.1646564315. The cubic root of 686763066 is about 882.2716215477.

The spelling of 686763066 in words is "six hundred eighty-six million, seven hundred sixty-three thousand, sixty-six".