1666939296 has 96 divisors (see below), whose sum is σ = 4890062016. Its totient is φ = 492800000.

The previous prime is 1666939279. The next prime is 1666939303. The reversal of 1666939296 is 6929396661.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24046 + ... + 62546.

It is an arithmetic number, because the mean of its divisors is an integer number (50938146).

Almost surely, 2^1666939296 is an apocalyptic number.

1666939296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666939296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2445031008).

1666939296 is an abundant number, since it is smaller than the sum of its proper divisors (3223122720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666939296 is a wasteful number, since it uses less digits than its factorization.

1666939296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38566 (or 38558 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 57.

The square root of 1666939296 is about 40828.1679236284. The cubic root of 1666939296 is about 1185.6957455354.

The spelling of 1666939296 in words is "one billion, six hundred sixty-six million, nine hundred thirty-nine thousand, two hundred ninety-six".