206974016660 has 12 divisors (see below), whose sum is σ = 434645435028. Its totient is φ = 82789606656.

The previous prime is 206974016657. The next prime is 206974016663. The reversal of 206974016660 is 66610479602.

It is an interprime number because it is at equal distance from previous prime (206974016657) and next prime (206974016663).

It can be written as a sum of positive squares in 2 ways, for example, as 106538265604 + 100435751056 = 326402^2 + 316916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206974016663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5174350397 + ... + 5174350436.

It is an arithmetic number, because the mean of its divisors is an integer number (36220452919).

Almost surely, 2^206974016660 is an apocalyptic number.

206974016660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206974016660 is an abundant number, since it is smaller than the sum of its proper divisors (227671418368).

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

206974016660 is a wasteful number, since it uses less digits than its factorization.

206974016660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348700842 (or 10348700840 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 206974016660 in words is "two hundred six billion, nine hundred seventy-four million, sixteen thousand, six hundred sixty".