203164661 has 16 divisors (see below), whose sum is σ = 237686400. Its totient is φ = 170066688.

The previous prime is 203164609. The next prime is 203164711. The reversal of 203164661 is 166461302.

It is a happy number.

203164661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203164661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203164601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49745 + ... + 53673.

It is an arithmetic number, because the mean of its divisors is an integer number (14855400).

Almost surely, 2^203164661 is an apocalyptic number.

It is an amenable number.

203164661 is a deficient number, since it is larger than the sum of its proper divisors (34521739).

203164661 is an equidigital number, since it uses as much as digits as its factorization.

203164661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 203164661 is about 14253.5841457509. The cubic root of 203164661 is about 587.8719284291.

The spelling of 203164661 in words is "two hundred three million, one hundred sixty-four thousand, six hundred sixty-one".