1664101490687 has 8 divisors (see below), whose sum is σ = 1681283859696. Its totient is φ = 1646919666432.

The previous prime is 1664101490671. The next prime is 1664101490741. The reversal of 1664101490687 is 7860941014661.

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

It is a cyclic number.

It is not a de Polignac number, because 1664101490687 - 2⁴ = 1664101490671 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 (1664101490587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9517628 + ... + 9690894.

It is an arithmetic number, because the mean of its divisors is an integer number (210160482462).

Almost surely, 2^{1664101490687} is an apocalyptic number.

1664101490687 is a deficient number, since it is larger than the sum of its proper divisors (17182369009).

1664101490687 is an equidigital number, since it uses as much as digits as its factorization.

1664101490687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272377.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 1664101490687 in words is "one trillion, six hundred sixty-four billion, one hundred one million, four hundred ninety thousand, six hundred eighty-seven".