1666652147 has 2 divisors, whose sum is σ = 1666652148. Its totient is φ = 1666652146.

The previous prime is 1666652047. The next prime is 1666652191. The reversal of 1666652147 is 7412566661.

It is an a-pointer prime, because the next prime (1666652191) can be obtained adding 1666652147 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1666652147 - 2¹⁶ = 1666586611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1666652098 and 1666652107.

It is not a weakly prime, because it can be changed into another prime (1666652047) 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, 833326073 + 833326074.

It is an arithmetic number, because the mean of its divisors is an integer number (833326074).

Almost surely, 2^1666652147 is an apocalyptic number.

1666652147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666652147 is an equidigital number, since it uses as much as digits as its factorization.

1666652147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 1666652147 is about 40824.6512171262. The cubic root of 1666652147 is about 1185.6276584930.

The spelling of 1666652147 in words is "one billion, six hundred sixty-six million, six hundred fifty-two thousand, one hundred forty-seven".