206669572 has 6 divisors (see below), whose sum is σ = 361671758. Its totient is φ = 103334784.

The previous prime is 206669557. The next prime is 206669579. The reversal of 206669572 is 275966602.

It can be written as a sum of positive squares in only one way, i.e., 206669376 + 196 = 14376^2 + 14^2 .

It is not an unprimeable number, because it can be changed into a prime (206669579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25833693 + ... + 25833700.

Almost surely, 2^206669572 is an apocalyptic number.

It is an amenable number.

206669572 is a deficient number, since it is larger than the sum of its proper divisors (155002186).

206669572 is a wasteful number, since it uses less digits than its factorization.

206669572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51667397 (or 51667395 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 206669572 is about 14376.0068169155. The cubic root of 206669572 is about 591.2332453718.

The spelling of 206669572 in words is "two hundred six million, six hundred sixty-nine thousand, five hundred seventy-two".