686656146 has 32 divisors (see below), whose sum is σ = 1586288448. Its totient is φ = 195837440.

The previous prime is 686656109. The next prime is 686656183. The reversal of 686656146 is 641656686.

It is an interprime number because it is at equal distance from previous prime (686656109) and next prime (686656183).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 686656095 and 686656104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304875 + ... + 307118.

It is an arithmetic number, because the mean of its divisors is an integer number (49571514).

Almost surely, 2^686656146 is an apocalyptic number.

686656146 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

686656146 is an abundant number, since it is smaller than the sum of its proper divisors (899632302).

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

686656146 is a wasteful number, since it uses less digits than its factorization.

686656146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612026.

The product of its digits is 1244160, while the sum is 48.

The square root of 686656146 is about 26204.1245990016. The cubic root of 686656146 is about 882.2258331323.

The spelling of 686656146 in words is "six hundred eighty-six million, six hundred fifty-six thousand, one hundred forty-six".