664521453563010 has 32 divisors (see below), whose sum is σ = 1594854161651520. Its totient is φ = 177205423939008.

The previous prime is 664521453562979. The next prime is 664521453563017. The reversal of 664521453563010 is 10365354125466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (664521453563017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63757 + ... + 36456096.

It is an arithmetic number, because the mean of its divisors is an integer number (49839192551610).

Almost surely, 2^{664521453563010} is an apocalyptic number.

664521453563010 is an abundant number, since it is smaller than the sum of its proper divisors (930332708088510).

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

664521453563010 is a wasteful number, since it uses less digits than its factorization.

664521453563010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37126402.

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 664521453563010 in words is "six hundred sixty-four trillion, five hundred twenty-one billion, four hundred fifty-three million, five hundred sixty-three thousand, ten".