1666350031 has 2 divisors, whose sum is σ = 1666350032. Its totient is φ = 1666350030.

The previous prime is 1666350017. The next prime is 1666350067. The reversal of 1666350031 is 1300536661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666350031 is a prime.

It is a super-2 number, since 2×1666350031² = 5553444851627401922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1666349975 and 1666350002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666350131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833175015 + 833175016.

It is an arithmetic number, because the mean of its divisors is an integer number (833175016).

Almost surely, 2^1666350031 is an apocalyptic number.

1666350031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666350031 is an equidigital number, since it uses as much as digits as its factorization.

1666350031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1666350031 is about 40820.9508830943. The cubic root of 1666350031 is about 1185.5560141226.

Adding to 1666350031 its reverse (1300536661), we get a palindrome (2966886692).

The spelling of 1666350031 in words is "one billion, six hundred sixty-six million, three hundred fifty thousand, thirty-one".