1666893141 has 8 divisors (see below), whose sum is σ = 2469471360. Its totient is φ = 1111262076.

The previous prime is 1666893133. The next prime is 1666893167. The reversal of 1666893141 is 1413986661.

It is not a de Polignac number, because 1666893141 - 2³ = 1666893133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666893941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30868365 + ... + 30868418.

It is an arithmetic number, because the mean of its divisors is an integer number (308683920).

Almost surely, 2^1666893141 is an apocalyptic number.

It is an amenable number.

1666893141 is a deficient number, since it is larger than the sum of its proper divisors (802578219).

1666893141 is an equidigital number, since it uses as much as digits as its factorization.

1666893141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61736792 (or 61736786 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1666893141 is about 40827.6026849483. The cubic root of 1666893141 is about 1185.6848020671.

The spelling of 1666893141 in words is "one billion, six hundred sixty-six million, eight hundred ninety-three thousand, one hundred forty-one".