1660015510001 has 4 divisors (see below), whose sum is σ = 1660037308404. Its totient is φ = 1659993711600.

The previous prime is 1660015509967. The next prime is 1660015510057. The reversal of 1660015510001 is 1000155100661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130957134400 + 1529058375601 = 361880^2 + 1236551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660015510001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660015510061) 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, 10784570 + ... + 10937411.

It is an arithmetic number, because the mean of its divisors is an integer number (415009327101).

Almost surely, 2^{1660015510001} is an apocalyptic number.

It is an amenable number.

1660015510001 is a deficient number, since it is larger than the sum of its proper divisors (21798403).

1660015510001 is an equidigital number, since it uses as much as digits as its factorization.

1660015510001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21798402.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 1660015510001 in words is "one trillion, six hundred sixty billion, fifteen million, five hundred ten thousand, one".