641166403 has 4 divisors (see below), whose sum is σ = 641249200. Its totient is φ = 641083608.

The previous prime is 641166391. The next prime is 641166437. The reversal of 641166403 is 304661146.

641166403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304661146 = 2 ⋅152330573.

It is a cyclic number.

It is not a de Polignac number, because 641166403 - 2²¹ = 639069251 is a prime.

It is a super-2 number, since 2×641166403² = 822188712671916818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641166503) 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, 28428 + ... + 45721.

It is an arithmetic number, because the mean of its divisors is an integer number (160312300).

Almost surely, 2^641166403 is an apocalyptic number.

641166403 is a deficient number, since it is larger than the sum of its proper divisors (82797).

641166403 is an equidigital number, since it uses as much as digits as its factorization.

641166403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82796.

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

The square root of 641166403 is about 25321.2638507638. The cubic root of 641166403 is about 862.2970872659.

The spelling of 641166403 in words is "six hundred forty-one million, one hundred sixty-six thousand, four hundred three".