664235267 has 2 divisors, whose sum is σ = 664235268. Its totient is φ = 664235266.

The previous prime is 664235263. The next prime is 664235279. The reversal of 664235267 is 762532466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664235267 - 2² = 664235263 is a prime.

It is a super-2 number, since 2×664235267² = 882416979853122578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664235263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332117633 + 332117634.

It is an arithmetic number, because the mean of its divisors is an integer number (332117634).

Almost surely, 2^664235267 is an apocalyptic number.

664235267 is a deficient number, since it is larger than the sum of its proper divisors (1).

664235267 is an equidigital number, since it uses as much as digits as its factorization.

664235267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 41.

The square root of 664235267 is about 25772.7621142942. The cubic root of 664235267 is about 872.5171594012.

The spelling of 664235267 in words is "six hundred sixty-four million, two hundred thirty-five thousand, two hundred sixty-seven".