686650461 has 8 divisors (see below), whose sum is σ = 1046324544. Its totient is φ = 392371680.

The previous prime is 686650399. The next prime is 686650463. The reversal of 686650461 is 164056686.

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

It is not a de Polignac number, because 686650461 - 2²⁵ = 653096029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686650463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16348800 + ... + 16348841.

It is an arithmetic number, because the mean of its divisors is an integer number (130790568).

Almost surely, 2^686650461 is an apocalyptic number.

It is an amenable number.

686650461 is a deficient number, since it is larger than the sum of its proper divisors (359674083).

686650461 is a wasteful number, since it uses less digits than its factorization.

686650461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32697651.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 686650461 is about 26204.0161234876. The cubic root of 686650461 is about 882.2233984020.

The spelling of 686650461 in words is "six hundred eighty-six million, six hundred fifty thousand, four hundred sixty-one".