1668501683331 has 32 divisors (see below), whose sum is σ = 2693048767488. Its totient is φ = 897007964160.

The previous prime is 1668501683243. The next prime is 1668501683351. The reversal of 1668501683331 is 1333861058661.

It is a happy number.

It is not a de Polignac number, because 1668501683331 - 2⁷ = 1668501683203 is a prime.

It is a super-3 number, since 3×1668501683331³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1668501683351) 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, 73171 + ... + 1828211.

It is an arithmetic number, because the mean of its divisors is an integer number (84157773984).

Almost surely, 2^{1668501683331} is an apocalyptic number.

1668501683331 is a deficient number, since it is larger than the sum of its proper divisors (1024547084157).

1668501683331 is a wasteful number, since it uses less digits than its factorization.

1668501683331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757731.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 1668501683331 in words is "one trillion, six hundred sixty-eight billion, five hundred one million, six hundred eighty-three thousand, three hundred thirty-one".