664567941 has 16 divisors (see below), whose sum is σ = 891878400. Its totient is φ = 440161008.

The previous prime is 664567913. The next prime is 664567949. The reversal of 664567941 is 149765466.

It is not a de Polignac number, because 664567941 - 2¹⁷ = 664436869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664567949) 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, 420090 + ... + 421668.

It is an arithmetic number, because the mean of its divisors is an integer number (55742400).

Almost surely, 2^664567941 is an apocalyptic number.

It is an amenable number.

664567941 is a deficient number, since it is larger than the sum of its proper divisors (227310459).

664567941 is a wasteful number, since it uses less digits than its factorization.

664567941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408.

The product of its digits is 1088640, while the sum is 48.

The square root of 664567941 is about 25779.2152906174. The cubic root of 664567941 is about 872.6627982248.

The spelling of 664567941 in words is "six hundred sixty-four million, five hundred sixty-seven thousand, nine hundred forty-one".