1666066151 has 4 divisors (see below), whose sum is σ = 1668954192. Its totient is φ = 1663178112.

The previous prime is 1666066133. The next prime is 1666066217. The reversal of 1666066151 is 1516606661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666066151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666066751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443155 + ... + 1444308.

It is an arithmetic number, because the mean of its divisors is an integer number (417238548).

Almost surely, 2^1666066151 is an apocalyptic number.

1666066151 is a deficient number, since it is larger than the sum of its proper divisors (2888041).

1666066151 is an equidigital number, since it uses as much as digits as its factorization.

1666066151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888040.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1666066151 is about 40817.4735989380. The cubic root of 1666066151 is about 1185.4886863805.

The spelling of 1666066151 in words is "one billion, six hundred sixty-six million, sixty-six thousand, one hundred fifty-one".