206606740 has 24 divisors (see below), whose sum is σ = 434983752. Its totient is φ = 82431360.

The previous prime is 206606713. The next prime is 206606767. The reversal of 206606740 is 47606602.

It is an interprime number because it is at equal distance from previous prime (206606713) and next prime (206606767).

It can be written as a sum of positive squares in 4 ways, for example, as 93779856 + 112826884 = 9684^2 + 10622^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5071 + ... + 20950.

It is an arithmetic number, because the mean of its divisors is an integer number (18124323).

Almost surely, 2^206606740 is an apocalyptic number.

206606740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206606740 is an abundant number, since it is smaller than the sum of its proper divisors (228377012).

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

206606740 is a wasteful number, since it uses less digits than its factorization.

206606740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26427 (or 26425 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 206606740 is about 14373.8213429832. The cubic root of 206606740 is about 591.1733234197.

The spelling of 206606740 in words is "two hundred six million, six hundred six thousand, seven hundred forty".