1473722001666 has 20 divisors (see below), whose sum is σ = 3302228930022. Its totient is φ = 491240667168.

The previous prime is 1473722001641. The next prime is 1473722001673. The reversal of 1473722001666 is 6661002273741.

It can be written as a sum of positive squares in only one way, i.e., 1450639580625 + 23082421041 = 1204425^2 + 151929^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4548524535 + ... + 4548524858.

Almost surely, 2^{1473722001666} is an apocalyptic number.

1473722001666 is an abundant number, since it is smaller than the sum of its proper divisors (1828506928356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1473722001666 is an equidigital number, since it uses as much as digits as its factorization.

1473722001666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9097049407 (or 9097049398 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 1473722001666 in words is "one trillion, four hundred seventy-three billion, seven hundred twenty-two million, one thousand, six hundred sixty-six".