664126226 has 4 divisors (see below), whose sum is σ = 996189342. Its totient is φ = 332063112.

The previous prime is 664126201. The next prime is 664126259. The reversal of 664126226 is 622621466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 576048001 + 88078225 = 24001^2 + 9385^2 .

It is a super-2 number, since 2×664126226² = 882127288122006152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166031555 + ... + 166031558.

Almost surely, 2^664126226 is an apocalyptic number.

664126226 is a deficient number, since it is larger than the sum of its proper divisors (332063116).

664126226 is a wasteful number, since it uses less digits than its factorization.

664126226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332063115.

The product of its digits is 41472, while the sum is 35.

The square root of 664126226 is about 25770.6465964671. The cubic root of 664126226 is about 872.4694125888.

The spelling of 664126226 in words is "six hundred sixty-four million, one hundred twenty-six thousand, two hundred twenty-six".