660228308 has 6 divisors (see below), whose sum is σ = 1155399546. Its totient is φ = 330114152.

The previous prime is 660228307. The next prime is 660228313. The reversal of 660228308 is 803822066.

It can be written as a sum of positive squares in only one way, i.e., 659359684 + 868624 = 25678^2 + 932^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660228301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82528535 + ... + 82528542.

It is an arithmetic number, because the mean of its divisors is an integer number (192566591).

Almost surely, 2^660228308 is an apocalyptic number.

It is an amenable number.

660228308 is a deficient number, since it is larger than the sum of its proper divisors (495171238).

660228308 is a wasteful number, since it uses less digits than its factorization.

660228308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165057081 (or 165057079 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 660228308 is about 25694.9082115504. The cubic root of 660228308 is about 870.7591506558.

The spelling of 660228308 in words is "six hundred sixty million, two hundred twenty-eight thousand, three hundred eight".