1664467431001 has 4 divisors (see below), whose sum is σ = 1703175975952. Its totient is φ = 1625758886052.

The previous prime is 1664467430999. The next prime is 1664467431041. The reversal of 1664467431001 is 1001347644661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1664467431001 - 2¹ = 1664467430999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 38708544907 = 1664467431001 / (1 + 6 + 6 + 4 + 4 + 6 + 7 + 4 + 3 + 1 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664467431041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19354272411 + ... + 19354272496.

It is an arithmetic number, because the mean of its divisors is an integer number (425793993988).

Almost surely, 2^{1664467431001} is an apocalyptic number.

It is an amenable number.

1664467431001 is a deficient number, since it is larger than the sum of its proper divisors (38708544951).

1664467431001 is an equidigital number, since it uses as much as digits as its factorization.

1664467431001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38708544950.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 1664467431001 in words is "one trillion, six hundred sixty-four billion, four hundred sixty-seven million, four hundred thirty-one thousand, one".