1666493792 has 24 divisors (see below), whose sum is σ = 3294538632. Its totient is φ = 829785600.

The previous prime is 1666493789. The next prime is 1666493797. The reversal of 1666493792 is 2973946661.

It is a super-3 number, since 3×1666493792³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666493797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100334 + ... + 115757.

It is an arithmetic number, because the mean of its divisors is an integer number (137272443).

Almost surely, 2^1666493792 is an apocalyptic number.

It is an amenable number.

1666493792 is a deficient number, since it is larger than the sum of its proper divisors (1628044840).

1666493792 is a wasteful number, since it uses less digits than its factorization.

1666493792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216342 (or 216334 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 53.

The square root of 1666493792 is about 40822.7117178661. The cubic root of 1666493792 is about 1185.5901069630.

The spelling of 1666493792 in words is "one billion, six hundred sixty-six million, four hundred ninety-three thousand, seven hundred ninety-two".