1666740401722 has 32 divisors (see below), whose sum is σ = 2871031377600. Its totient is φ = 717712358400.

The previous prime is 1666740401693. The next prime is 1666740401813. The reversal of 1666740401722 is 2271040476661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25574554 + ... + 25639642.

It is an arithmetic number, because the mean of its divisors is an integer number (89719730550).

Almost surely, 2^{1666740401722} is an apocalyptic number.

1666740401722 is a deficient number, since it is larger than the sum of its proper divisors (1204290975878).

1666740401722 is a wasteful number, since it uses less digits than its factorization.

1666740401722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126382.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 1666740401722 in words is "one trillion, six hundred sixty-six billion, seven hundred forty million, four hundred one thousand, seven hundred twenty-two".