1668501670199 has 32 divisors (see below), whose sum is σ = 2093302149120. Its totient is φ = 1294774232832.

The previous prime is 1668501670181. The next prime is 1668501670211. The reversal of 1668501670199 is 9910761058661.

It is a cyclic number.

It is not a de Polignac number, because 1668501670199 - 2⁸ = 1668501669943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668501670169) 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, 487514 + ... + 1890680.

It is an arithmetic number, because the mean of its divisors is an integer number (65415692160).

Almost surely, 2^{1668501670199} is an apocalyptic number.

1668501670199 is a deficient number, since it is larger than the sum of its proper divisors (424800478921).

1668501670199 is a wasteful number, since it uses less digits than its factorization.

1668501670199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403439.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 1668501670199 in words is "one trillion, six hundred sixty-eight billion, five hundred one million, six hundred seventy thousand, one hundred ninety-nine".