686466020 has 24 divisors (see below), whose sum is σ = 1472252544. Its totient is φ = 268743776.

The previous prime is 686466019. The next prime is 686466023. The reversal of 686466020 is 20664686.

686466020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686466020² = 942471193229280800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686466023) 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, 364202 + ... + 366081.

It is an arithmetic number, because the mean of its divisors is an integer number (61343856).

Almost surely, 2^686466020 is an apocalyptic number.

It is an amenable number.

686466020 is an abundant number, since it is smaller than the sum of its proper divisors (785786524).

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

686466020 is a wasteful number, since it uses less digits than its factorization.

686466020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730339 (or 730337 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 686466020 is about 26200.4965601799. The cubic root of 686466020 is about 882.1444000632.

The spelling of 686466020 in words is "six hundred eighty-six million, four hundred sixty-six thousand, twenty".