1660555240445 has 16 divisors (see below), whose sum is σ = 2004013987248. Its totient is φ = 1320881541120.

The previous prime is 1660555240429. The next prime is 1660555240483. The reversal of 1660555240445 is 5440425550661.

It can be written as a sum of positive squares in 8 ways, for example, as 273281154169 + 1387274086276 = 522763^2 + 1177826^2 .

It is not a de Polignac number, because 1660555240445 - 2⁴ = 1660555240429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660555240445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5311517 + ... + 5615453.

It is an arithmetic number, because the mean of its divisors is an integer number (125250874203).

Almost surely, 2^{1660555240445} is an apocalyptic number.

It is an amenable number.

1660555240445 is a deficient number, since it is larger than the sum of its proper divisors (343458746803).

1660555240445 is a wasteful number, since it uses less digits than its factorization.

1660555240445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310160.

The product of its (nonzero) digits is 2880000, while the sum is 47.

The spelling of 1660555240445 in words is "one trillion, six hundred sixty billion, five hundred fifty-five million, two hundred forty thousand, four hundred forty-five".