664612740552 has 32 divisors (see below), whose sum is σ = 1661687215200. Its totient is φ = 221516865024.

The previous prime is 664612740551. The next prime is 664612740641. The reversal of 664612740552 is 255047216466.

It is not an unprimeable number, because it can be changed into a prime (664612740551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031593 + ... + 1547064.

It is an arithmetic number, because the mean of its divisors is an integer number (51927725475).

Almost surely, 2^664612740552 is an apocalyptic number.

It is an amenable number.

664612740552 is an abundant number, since it is smaller than the sum of its proper divisors (997074474648).

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

664612740552 is a wasteful number, since it uses less digits than its factorization.

664612740552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589405 (or 2589401 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 664612740552 in words is "six hundred sixty-four billion, six hundred twelve million, seven hundred forty thousand, five hundred fifty-two".