2010721665706 has 16 divisors (see below), whose sum is σ = 3248112242088. Its totient is φ = 928018699200.

The previous prime is 2010721665611. The next prime is 2010721665707. The reversal of 2010721665706 is 6075661270102.

It can be written as a sum of positive squares in 4 ways, for example, as 774602413225 + 1236119252481 = 880115^2 + 1111809^2 .

It is a super-2 number, since 2×2010721665706² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2010721665707) 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, 6684096 + ... + 6978436.

Almost surely, 2^{2010721665706} is an apocalyptic number.

2010721665706 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2010721665706 is a deficient number, since it is larger than the sum of its proper divisors (1237390576382).

2010721665706 is a wasteful number, since it uses less digits than its factorization.

2010721665706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557097.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 2010721665706 in words is "two trillion, ten billion, seven hundred twenty-one million, six hundred sixty-five thousand, seven hundred six".