10691686 has 4 divisors (see below), whose sum is σ = 16037532. Its totient is φ = 5345842.

The previous prime is 10691663. The next prime is 10691713. The reversal of 10691686 is 68619601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68619601 = 137 ⋅500873.

It is a super-2 number, since 2×10691686² = 228624299045192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2672920 + ... + 2672923.

It is an arithmetic number, because the mean of its divisors is an integer number (4009383).

Almost surely, 2^10691686 is an apocalyptic number.

10691686 is a deficient number, since it is larger than the sum of its proper divisors (5345846).

10691686 is an equidigital number, since it uses as much as digits as its factorization.

10691686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345845.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 10691686 is about 3269.8143678197. The cubic root of 10691686 is about 220.3004572429.

The spelling of 10691686 in words is "ten million, six hundred ninety-one thousand, six hundred eighty-six".