1662003001 has 4 divisors (see below), whose sum is σ = 1662102900. Its totient is φ = 1661903104.

The previous prime is 1662002987. The next prime is 1662003029. The reversal of 1662003001 is 1003002661.

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 can be written as a sum of positive squares in 2 ways, for example, as 752075776 + 909927225 = 27424^2 + 30165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662003001 - 2¹⁹ = 1661478713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1662003001.

It is not an unprimeable number, because it can be changed into a prime (1662003041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18316 + ... + 60493.

It is an arithmetic number, because the mean of its divisors is an integer number (415525725).

Almost surely, 2^1662003001 is an apocalyptic number.

It is an amenable number.

1662003001 is a deficient number, since it is larger than the sum of its proper divisors (99899).

1662003001 is an equidigital number, since it uses as much as digits as its factorization.

1662003001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99898.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1662003001 is about 40767.6710274207. The cubic root of 1662003001 is about 1184.5241909894.

Adding to 1662003001 its reverse (1003002661), we get a palindrome (2665005662).

The spelling of 1662003001 in words is "one billion, six hundred sixty-two million, three thousand, one".