1668072904949 has 8 divisors (see below), whose sum is σ = 1830234487392. Its totient is φ = 1507664421040.

The previous prime is 1668072904933. The next prime is 1668072904951. The reversal of 1668072904949 is 9494092708661.

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

It is a cyclic number.

It is not a de Polignac number, because 1668072904949 - 2⁴ = 1668072904933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668072904919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438272639 + ... + 438276444.

It is an arithmetic number, because the mean of its divisors is an integer number (228779310924).

Almost surely, 2^{1668072904949} is an apocalyptic number.

It is an amenable number.

1668072904949 is a deficient number, since it is larger than the sum of its proper divisors (162161582443).

1668072904949 is a wasteful number, since it uses less digits than its factorization.

1668072904949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876549267.

The product of its (nonzero) digits is 47029248, while the sum is 65.

The spelling of 1668072904949 in words is "one trillion, six hundred sixty-eight billion, seventy-two million, nine hundred four thousand, nine hundred forty-nine".