664557822854 has 16 divisors (see below), whose sum is σ = 1003535241792. Its totient is φ = 330048445608.

The previous prime is 664557822779. The next prime is 664557822869. The reversal of 664557822854 is 458228755466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29864 + ... + 1153259.

It is an arithmetic number, because the mean of its divisors is an integer number (62720952612).

Almost surely, 2^664557822854 is an apocalyptic number.

664557822854 is a deficient number, since it is larger than the sum of its proper divisors (338977418938).

664557822854 is a wasteful number, since it uses less digits than its factorization.

664557822854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185011.

The product of its digits is 129024000, while the sum is 62.

The spelling of 664557822854 in words is "six hundred sixty-four billion, five hundred fifty-seven million, eight hundred twenty-two thousand, eight hundred fifty-four".