1668146973 has 8 divisors (see below), whose sum is σ = 2228107200. Its totient is φ = 1110142368.

The previous prime is 1668146969. The next prime is 1668146999. The reversal of 1668146973 is 3796418661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1668146973 - 2² = 1668146969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668146873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486913 + ... + 490326.

It is an arithmetic number, because the mean of its divisors is an integer number (278513400).

Almost surely, 2^1668146973 is an apocalyptic number.

It is an amenable number.

1668146973 is a deficient number, since it is larger than the sum of its proper divisors (559960227).

1668146973 is an equidigital number, since it uses as much as digits as its factorization.

1668146973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977811.

The product of its digits is 1306368, while the sum is 51.

The square root of 1668146973 is about 40842.9549983837. The cubic root of 1668146973 is about 1185.9820170704.

The spelling of 1668146973 in words is "one billion, six hundred sixty-eight million, one hundred forty-six thousand, nine hundred seventy-three".