664320229155 has 96 divisors (see below), whose sum is σ = 1263289547520. Its totient is φ = 320271840000.

The previous prime is 664320229121. The next prime is 664320229259. The reversal of 664320229155 is 551922023466.

664320229155 is a `hidden beast` number, since 66 + 432 + 0 + 2 + 2 + 9 + 155 = 666.

664320229155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664320229155 - 2¹² = 664320225059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 664320229155.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 149249680 + ... + 149254130.

It is an arithmetic number, because the mean of its divisors is an integer number (13159266120).

Almost surely, 2^664320229155 is an apocalyptic number.

664320229155 is a deficient number, since it is larger than the sum of its proper divisors (598969318365).

664320229155 is a wasteful number, since it uses less digits than its factorization.

664320229155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6113 (or 6110 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 664320229155 in words is "six hundred sixty-four billion, three hundred twenty million, two hundred twenty-nine thousand, one hundred fifty-five".