664527012 has 12 divisors (see below), whose sum is σ = 1550563056. Its totient is φ = 221509000.

The previous prime is 664527011. The next prime is 664527013. The reversal of 664527012 is 210725466.

664527012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (664527011) and next prime (664527013).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×664527012² = 883192299355296288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664527011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27688614 + ... + 27688637.

It is an arithmetic number, because the mean of its divisors is an integer number (129213588).

Almost surely, 2^664527012 is an apocalyptic number.

It is an amenable number.

664527012 is an abundant number, since it is smaller than the sum of its proper divisors (886036044).

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

664527012 is a wasteful number, since it uses less digits than its factorization.

664527012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55377258 (or 55377256 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 664527012 is about 25778.4214411977. The cubic root of 664527012 is about 872.6448828512.

The spelling of 664527012 in words is "six hundred sixty-four million, five hundred twenty-seven thousand, twelve".