1475376121666 has 48 divisors (see below), whose sum is σ = 2259418274280. Its totient is φ = 722518917120.

The previous prime is 1475376121663. The next prime is 1475376121699. The reversal of 1475376121666 is 6661216735741.

It can be written as a sum of positive squares in 12 ways, for example, as 670998531025 + 804377590641 = 819145^2 + 896871^2 .

It is not an unprimeable number, because it can be changed into a prime (1475376121663) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1047107970 + ... + 1047109378.

Almost surely, 2^{1475376121666} is an apocalyptic number.

1475376121666 is a deficient number, since it is larger than the sum of its proper divisors (784042152614).

1475376121666 is a wasteful number, since it uses less digits than its factorization.

1475376121666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167 (or 2078 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 55.

The spelling of 1475376121666 in words is "one trillion, four hundred seventy-five billion, three hundred seventy-six million, one hundred twenty-one thousand, six hundred sixty-six".