1660645214615 has 8 divisors (see below), whose sum is σ = 1993143801168. Its totient is φ = 1328269809280.

The previous prime is 1660645214609. The next prime is 1660645214689. The reversal of 1660645214615 is 5164125460661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1660645214615 - 2⁸ = 1660645214359 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 1660645214615.

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, 30765641 + ... + 30819570.

It is an arithmetic number, because the mean of its divisors is an integer number (249142975146).

Almost surely, 2^{1660645214615} is an apocalyptic number.

1660645214615 is a deficient number, since it is larger than the sum of its proper divisors (332498586553).

1660645214615 is an equidigital number, since it uses as much as digits as its factorization.

1660645214615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61590609.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 1660645214615 in words is "one trillion, six hundred sixty billion, six hundred forty-five million, two hundred fourteen thousand, six hundred fifteen".