664221435 has 8 divisors (see below), whose sum is σ = 1062754320. Its totient is φ = 354251424.

The previous prime is 664221403. The next prime is 664221463. The reversal of 664221435 is 534122466.

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

It is not a de Polignac number, because 664221435 - 2⁵ = 664221403 is a prime.

It is a super-2 number, since 2×664221435² = 882380229426918450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664221396 and 664221405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22140700 + ... + 22140729.

It is an arithmetic number, because the mean of its divisors is an integer number (132844290).

Almost surely, 2^664221435 is an apocalyptic number.

664221435 is a deficient number, since it is larger than the sum of its proper divisors (398532885).

664221435 is a wasteful number, since it uses less digits than its factorization.

664221435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44281437.

The product of its digits is 34560, while the sum is 33.

The square root of 664221435 is about 25772.4937675810. The cubic root of 664221435 is about 872.5111029422.

The spelling of 664221435 in words is "six hundred sixty-four million, two hundred twenty-one thousand, four hundred thirty-five".