1666063199 has 4 divisors (see below), whose sum is σ = 1666400040. Its totient is φ = 1665726360.

The previous prime is 1666063187. The next prime is 1666063211. The reversal of 1666063199 is 9913606661.

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

It is an interprime number because it is at equal distance from previous prime (1666063187) and next prime (1666063211).

It is a cyclic number.

It is not a de Polignac number, because 1666063199 - 2¹² = 1666059103 is a prime.

It is a super-2 number, since 2×1666063199² = 5551533166124227202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666063169) 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, 160889 + ... + 170930.

It is an arithmetic number, because the mean of its divisors is an integer number (416600010).

Almost surely, 2^1666063199 is an apocalyptic number.

1666063199 is a deficient number, since it is larger than the sum of its proper divisors (336841).

1666063199 is an equidigital number, since it uses as much as digits as its factorization.

1666063199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336840.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 1666063199 is about 40817.4374379382. The cubic root of 1666063199 is about 1185.4879862153.

The spelling of 1666063199 in words is "one billion, six hundred sixty-six million, sixty-three thousand, one hundred ninety-nine".