2031071666 has 16 divisors (see below), whose sum is σ = 3394099800. Its totient is φ = 905092608.

The previous prime is 2031071659. The next prime is 2031071689. The reversal of 2031071666 is 6661701302.

It can be written as a sum of positive squares in 4 ways, for example, as 1171350625 + 859721041 = 34225^2 + 29321^2 .

It is a super-2 number, since 2×2031071666² = 8250504224856031112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346111 + ... + 1347618.

Almost surely, 2^2031071666 is an apocalyptic number.

2031071666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2031071666 is a deficient number, since it is larger than the sum of its proper divisors (1363028134).

2031071666 is a wasteful number, since it uses less digits than its factorization.

2031071666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693773.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 2031071666 is about 45067.4124617777. The cubic root of 2031071666 is about 1266.4121909687.

Adding to 2031071666 its reverse (6661701302), we get a palindrome (8692772968).

The spelling of 2031071666 in words is "two billion, thirty-one million, seventy-one thousand, six hundred sixty-six".