1666461029 has 2 divisors, whose sum is σ = 1666461030. Its totient is φ = 1666461028.

The previous prime is 1666460977. The next prime is 1666461061. The reversal of 1666461029 is 9201646661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1241152900 + 425308129 = 35230^2 + 20623^2 .

It is a cyclic number.

It is not a de Polignac number, because 1666461029 - 2⁸ = 1666460773 is a prime.

It is a super-2 number, since 2×1666461029² = 5554184722351477682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666461229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833230514 + 833230515.

It is an arithmetic number, because the mean of its divisors is an integer number (833230515).

Almost surely, 2^1666461029 is an apocalyptic number.

It is an amenable number.

1666461029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666461029 is an equidigital number, since it uses as much as digits as its factorization.

1666461029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 1666461029 is about 40822.3104319195. The cubic root of 1666461029 is about 1185.5823374084.

The spelling of 1666461029 in words is "one billion, six hundred sixty-six million, four hundred sixty-one thousand, twenty-nine".