1666133467 has 4 divisors (see below), whose sum is σ = 1764141336. Its totient is φ = 1568125600.

The previous prime is 1666133461. The next prime is 1666133477. The reversal of 1666133467 is 7643316661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7643316661 = 193 ⋅39602677.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666133467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666133461) 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 in 3 ways as a sum of consecutive naturals, for example, 49003909 + ... + 49003942.

It is an arithmetic number, because the mean of its divisors is an integer number (441035334).

Almost surely, 2^1666133467 is an apocalyptic number.

1666133467 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1666133467 is a deficient number, since it is larger than the sum of its proper divisors (98007869).

1666133467 is an equidigital number, since it uses as much as digits as its factorization.

1666133467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98007868.

The product of its digits is 326592, while the sum is 43.

The square root of 1666133467 is about 40818.2981884350. The cubic root of 1666133467 is about 1185.5046523896.

The spelling of 1666133467 in words is "one billion, six hundred sixty-six million, one hundred thirty-three thousand, four hundred sixty-seven".