11001661003 has 2 divisors, whose sum is σ = 11001661004. Its totient is φ = 11001661002.

The previous prime is 11001660979. The next prime is 11001661019. The reversal of 11001661003 is 30016610011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11001661003 - 2¹³ = 11001652811 is a prime.

It is not a weakly prime, because it can be changed into another prime (11001661043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500830501 + 5500830502.

It is an arithmetic number, because the mean of its divisors is an integer number (5500830502).

Almost surely, 2^11001661003 is an apocalyptic number.

11001661003 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001661003 is an equidigital number, since it uses as much as digits as its factorization.

11001661003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 11001661003 in words is "eleven billion, one million, six hundred sixty-one thousand, three".