660849226 has 4 divisors (see below), whose sum is σ = 991273842. Its totient is φ = 330424612.

The previous prime is 660849223. The next prime is 660849239. The reversal of 660849226 is 622948066.

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., 538193601 + 122655625 = 23199^2 + 11075^2 .

It is not an unprimeable number, because it can be changed into a prime (660849221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165212305 + ... + 165212308.

Almost surely, 2^660849226 is an apocalyptic number.

660849226 is a deficient number, since it is larger than the sum of its proper divisors (330424616).

660849226 is a wasteful number, since it uses less digits than its factorization.

660849226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330424615.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 660849226 is about 25706.9878826750. The cubic root of 660849226 is about 871.0320363730.

The spelling of 660849226 in words is "six hundred sixty million, eight hundred forty-nine thousand, two hundred twenty-six".