1664001275 has 12 divisors (see below), whose sum is σ = 2081624952. Its totient is φ = 1319418240.

The previous prime is 1664001257. The next prime is 1664001319. The reversal of 1664001275 is 5721004661.

It is not a de Polignac number, because 1664001275 - 2¹⁶ = 1663935739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291689 + ... + 297338.

It is an arithmetic number, because the mean of its divisors is an integer number (173468746).

Almost surely, 2^1664001275 is an apocalyptic number.

1664001275 is a deficient number, since it is larger than the sum of its proper divisors (417623677).

1664001275 is a wasteful number, since it uses less digits than its factorization.

1664001275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589150 (or 589145 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1664001275 is about 40792.1717367438. The cubic root of 1664001275 is about 1184.9987300217.

The spelling of 1664001275 in words is "one billion, six hundred sixty-four million, one thousand, two hundred seventy-five".