1666670023 has 2 divisors, whose sum is σ = 1666670024. Its totient is φ = 1666670022.

The previous prime is 1666670003. The next prime is 1666670039. The reversal of 1666670023 is 3200766661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1666670023 - 2¹³ = 1666661831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666670003) 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, 833335011 + 833335012.

It is an arithmetic number, because the mean of its divisors is an integer number (833335012).

Almost surely, 2^1666670023 is an apocalyptic number.

1666670023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666670023 is an equidigital number, since it uses as much as digits as its factorization.

1666670023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 1666670023 is about 40824.8701528860. The cubic root of 1666670023 is about 1185.6318973708.

The spelling of 1666670023 in words is "one billion, six hundred sixty-six million, six hundred seventy thousand, twenty-three".