206691164 has 6 divisors (see below), whose sum is σ = 361709544. Its totient is φ = 103345580.

The previous prime is 206691137. The next prime is 206691187. The reversal of 206691164 is 461196602.

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, 25836392 + ... + 25836399.

It is an arithmetic number, because the mean of its divisors is an integer number (60284924).

Almost surely, 2^206691164 is an apocalyptic number.

It is an amenable number.

206691164 is a deficient number, since it is larger than the sum of its proper divisors (155018380).

206691164 is a wasteful number, since it uses less digits than its factorization.

206691164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51672795 (or 51672793 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 206691164 is about 14376.7577707910. The cubic root of 206691164 is about 591.2538345399.

The spelling of 206691164 in words is "two hundred six million, six hundred ninety-one thousand, one hundred sixty-four".