206450661 has 8 divisors (see below), whose sum is σ = 277704000. Its totient is φ = 136415552.

The previous prime is 206450659. The next prime is 206450677. The reversal of 206450661 is 166054602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206450661 - 2¹ = 206450659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206455661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304161 + ... + 304838.

It is an arithmetic number, because the mean of its divisors is an integer number (34713000).

Almost surely, 2^206450661 is an apocalyptic number.

It is an amenable number.

206450661 is a deficient number, since it is larger than the sum of its proper divisors (71253339).

206450661 is a wasteful number, since it uses less digits than its factorization.

206450661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609115.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 206450661 is about 14368.3910372734. The cubic root of 206450661 is about 591.0244205884.

It can be divided in two parts, 2064 and 50661, that added together give a palindrome (52725).

The spelling of 206450661 in words is "two hundred six million, four hundred fifty thousand, six hundred sixty-one".