1666850003 has 32 divisors (see below), whose sum is σ = 2107593600. Its totient is φ = 1309875840.

The previous prime is 1666849999. The next prime is 1666850011. The reversal of 1666850003 is 3000586661.

It is not a de Polignac number, because 1666850003 - 2² = 1666849999 is a prime.

It is a super-2 number, since 2×1666850003² = 5556777865002200018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1666850033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 698873 + ... + 701253.

It is an arithmetic number, because the mean of its divisors is an integer number (65862300).

Almost surely, 2^1666850003 is an apocalyptic number.

1666850003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1666850003 is a deficient number, since it is larger than the sum of its proper divisors (440743597).

1666850003 is a wasteful number, since it uses less digits than its factorization.

1666850003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1666850003 is about 40827.0743869800. The cubic root of 1666850003 is about 1185.6745737545.

The spelling of 1666850003 in words is "one billion, six hundred sixty-six million, eight hundred fifty thousand, three".