686653011 has 32 divisors (see below), whose sum is σ = 1112390400. Its totient is φ = 415160640.

The previous prime is 686652991. The next prime is 686653013. The reversal of 686653011 is 110356686.

It is a happy number.

686653011 is a `hidden beast` number, since 68 + 66 + 530 + 1 + 1 = 666.

It is not a de Polignac number, because 686653011 - 2⁵ = 686652979 is a prime.

It is a super-2 number, since 2×686653011² = 942984715030732242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686653013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133200 + ... + 138258.

It is an arithmetic number, because the mean of its divisors is an integer number (34762200).

Almost surely, 2^686653011 is an apocalyptic number.

686653011 is a deficient number, since it is larger than the sum of its proper divisors (425737389).

686653011 is a wasteful number, since it uses less digits than its factorization.

686653011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536 (or 5530 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 686653011 is about 26204.0647801062. The cubic root of 686653011 is about 882.2244904990.

The spelling of 686653011 in words is "six hundred eighty-six million, six hundred fifty-three thousand, eleven".