1660210541465 has 12 divisors (see below), whose sum is σ = 2317518388836. Its totient is φ = 1138430085408.

The previous prime is 1660210541453. The next prime is 1660210541491. The reversal of 1660210541465 is 5641450120661.

It can be written as a sum of positive squares in 2 ways, for example, as 384205344649 + 1276005196816 = 619843^2 + 1129604^2 .

It is not a de Polignac number, because 1660210541465 - 2⁴ = 1660210541449 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3388184534 + ... + 3388185023.

It is an arithmetic number, because the mean of its divisors is an integer number (193126532403).

Almost surely, 2^{1660210541465} is an apocalyptic number.

It is an amenable number.

1660210541465 is a deficient number, since it is larger than the sum of its proper divisors (657307847371).

1660210541465 is an equidigital number, since it uses as much as digits as its factorization.

1660210541465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776369576 (or 6776369569 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 1660210541465 in words is "one trillion, six hundred sixty billion, two hundred ten million, five hundred forty-one thousand, four hundred sixty-five".