66518329950204 has 96 divisors (see below), whose sum is σ = 169433618726400. Its totient is φ = 20143473672960.

The previous prime is 66518329950143. The next prime is 66518329950221. The reversal of 66518329950204 is 40205992381566.

It is a super-2 number, since 2×66518329950204² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2300941302 + ... + 2300970210.

It is an arithmetic number, because the mean of its divisors is an integer number (1764933528400).

Almost surely, 2^{66518329950204} is an apocalyptic number.

It is an amenable number.

66518329950204 is an abundant number, since it is smaller than the sum of its proper divisors (102915288776196).

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

66518329950204 is a wasteful number, since it uses less digits than its factorization.

66518329950204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40083 (or 40081 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 60.

The spelling of 66518329950204 in words is "sixty-six trillion, five hundred eighteen billion, three hundred twenty-nine million, nine hundred fifty thousand, two hundred four".