664947060 has 24 divisors (see below), whose sum is σ = 1861851936. Its totient is φ = 177319200.

The previous prime is 664947053. The next prime is 664947067. The reversal of 664947060 is 60749466.

It is an interprime number because it is at equal distance from previous prime (664947053) and next prime (664947067).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664947067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5541166 + ... + 5541285.

It is an arithmetic number, because the mean of its divisors is an integer number (77577164).

Almost surely, 2^664947060 is an apocalyptic number.

664947060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664947060 is an abundant number, since it is smaller than the sum of its proper divisors (1196904876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664947060 is a wasteful number, since it uses less digits than its factorization.

664947060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11082463 (or 11082461 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 664947060 is about 25786.5674334526. The cubic root of 664947060 is about 872.8287106091.

The spelling of 664947060 in words is "six hundred sixty-four million, nine hundred forty-seven thousand, sixty".