1660205170007 has 4 divisors (see below), whose sum is σ = 1660207752576. Its totient is φ = 1660202587440.

The previous prime is 1660205169991. The next prime is 1660205170021. The reversal of 1660205170007 is 7000715020661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1660205170007 - 2⁴ = 1660205169991 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 (1660205170907) 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, 518282 + ... + 1894472.

It is an arithmetic number, because the mean of its divisors is an integer number (415051938144).

Almost surely, 2^{1660205170007} is an apocalyptic number.

1660205170007 is a deficient number, since it is larger than the sum of its proper divisors (2582569).

1660205170007 is a wasteful number, since it uses less digits than its factorization.

1660205170007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582568.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 1660205170007 in words is "one trillion, six hundred sixty billion, two hundred five million, one hundred seventy thousand, seven".