206614669 has 4 divisors (see below), whose sum is σ = 207930844. Its totient is φ = 205298496.

The previous prime is 206614643. The next prime is 206614673. The reversal of 206614669 is 966416602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 966416602 = 2 ⋅483208301.

It can be written as a sum of positive squares in 2 ways, for example, as 91910569 + 114704100 = 9587^2 + 10710^2 .

It is a cyclic number.

It is not a de Polignac number, because 206614669 - 2¹¹ = 206612621 is a prime.

It is a super-2 number, since 2×206614669² = 85379242891959122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206614609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657852 + ... + 658165.

It is an arithmetic number, because the mean of its divisors is an integer number (51982711).

Almost surely, 2^206614669 is an apocalyptic number.

It is an amenable number.

206614669 is a deficient number, since it is larger than the sum of its proper divisors (1316175).

206614669 is a wasteful number, since it uses less digits than its factorization.

206614669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316174.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 206614669 is about 14374.0971542563. The cubic root of 206614669 is about 591.1808858599.

The spelling of 206614669 in words is "two hundred six million, six hundred fourteen thousand, six hundred sixty-nine".