641065967 has 8 divisors (see below), whose sum is σ = 663474240. Its totient is φ = 618677920.

The previous prime is 641065939. The next prime is 641065969. The reversal of 641065967 is 769560146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641065967 - 2¹⁰ = 641064943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641065969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89978 + ... + 96840.

It is an arithmetic number, because the mean of its divisors is an integer number (82934280).

Almost surely, 2^641065967 is an apocalyptic number.

641065967 is a deficient number, since it is larger than the sum of its proper divisors (22408273).

641065967 is a wasteful number, since it uses less digits than its factorization.

641065967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10113.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 641065967 is about 25319.2805387515. The cubic root of 641065967 is about 862.2520598532.

The spelling of 641065967 in words is "six hundred forty-one million, sixty-five thousand, nine hundred sixty-seven".