1662641203 has 4 divisors (see below), whose sum is σ = 1671827248. Its totient is φ = 1653455160.

The previous prime is 1662641173. The next prime is 1662641237. The reversal of 1662641203 is 3021462661.

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

It is a cyclic number.

It is not a de Polignac number, because 1662641203 - 2⁹ = 1662640691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662621203) 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, 4592751 + ... + 4593112.

It is an arithmetic number, because the mean of its divisors is an integer number (417956812).

Almost surely, 2^1662641203 is an apocalyptic number.

1662641203 is a deficient number, since it is larger than the sum of its proper divisors (9186045).

1662641203 is an equidigital number, since it uses as much as digits as its factorization.

1662641203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9186044.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1662641203 is about 40775.4975812681. The cubic root of 1662641203 is about 1184.6757889840.

The spelling of 1662641203 in words is "one billion, six hundred sixty-two million, six hundred forty-one thousand, two hundred three".