1666739517342 has 16 divisors (see below), whose sum is σ = 3441010616832. Its totient is φ = 537657908760.

The previous prime is 1666739517319. The next prime is 1666739517353. The reversal of 1666739517342 is 2437159376661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4480482388 + ... + 4480482759.

It is an arithmetic number, because the mean of its divisors is an integer number (215063163552).

Almost surely, 2^{1666739517342} is an apocalyptic number.

1666739517342 is an abundant number, since it is smaller than the sum of its proper divisors (1774271099490).

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

1666739517342 is a wasteful number, since it uses less digits than its factorization.

1666739517342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8960965183.

The product of its digits is 34292160, while the sum is 60.

The spelling of 1666739517342 in words is "one trillion, six hundred sixty-six billion, seven hundred thirty-nine million, five hundred seventeen thousand, three hundred forty-two".