1666339035522 has 64 divisors (see below), whose sum is σ = 4034823425280. Its totient is φ = 447868624896.

The previous prime is 1666339035469. The next prime is 1666339035523. The reversal of 1666339035522 is 2255309336661.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1666339035523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861604 + ... + 2018672.

It is an arithmetic number, because the mean of its divisors is an integer number (63044116020).

Almost surely, 2^{1666339035522} is an apocalyptic number.

1666339035522 is an abundant number, since it is smaller than the sum of its proper divisors (2368484389758).

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

1666339035522 is a wasteful number, since it uses less digits than its factorization.

1666339035522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159115.

The product of its (nonzero) digits is 5248800, while the sum is 51.

The spelling of 1666339035522 in words is "one trillion, six hundred sixty-six billion, three hundred thirty-nine million, thirty-five thousand, five hundred twenty-two".