206670534 has 64 divisors (see below), whose sum is σ = 485222400. Its totient is φ = 58658880.

The previous prime is 206670511. The next prime is 206670539. The reversal of 206670534 is 435076602.

It is a junction number, because it is equal to n+sod(n) for n = 206670495 and 206670504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206670539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479299 + ... + 479729.

It is an arithmetic number, because the mean of its divisors is an integer number (7581600).

Almost surely, 2^206670534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206670534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242611200).

206670534 is an abundant number, since it is smaller than the sum of its proper divisors (278551866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206670534 is a wasteful number, since it uses less digits than its factorization.

206670534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 206670534 is about 14376.0402754027. The cubic root of 206670534 is about 591.2341627226.

The spelling of 206670534 in words is "two hundred six million, six hundred seventy thousand, five hundred thirty-four".