1660465543679 has 4 divisors (see below), whose sum is σ = 1732659697776. Its totient is φ = 1588271389584.

The previous prime is 1660465543661. The next prime is 1660465543691. The reversal of 1660465543679 is 9763455640661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1660465543679 - 2⁸ = 1660465543423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660465543609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36097077014 + ... + 36097077059.

It is an arithmetic number, because the mean of its divisors is an integer number (433164924444).

Almost surely, 2^{1660465543679} is an apocalyptic number.

1660465543679 is a deficient number, since it is larger than the sum of its proper divisors (72194154097).

1660465543679 is an equidigital number, since it uses as much as digits as its factorization.

1660465543679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72194154096.

The product of its (nonzero) digits is 97977600, while the sum is 62.

The spelling of 1660465543679 in words is "one trillion, six hundred sixty billion, four hundred sixty-five million, five hundred forty-three thousand, six hundred seventy-nine".