66552508474436 has 12 divisors (see below), whose sum is σ = 117667579416828. Its totient is φ = 32933200069632.

The previous prime is 66552508474427. The next prime is 66552508474453. The reversal of 66552508474436 is 63447480525566.

It can be written as a sum of positive squares in 2 ways, for example, as 28543310648836 + 38009197825600 = 5342594^2 + 6165160^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85763541461 + ... + 85763542236.

It is an arithmetic number, because the mean of its divisors is an integer number (9805631618069).

Almost surely, 2^{66552508474436} is an apocalyptic number.

It is an amenable number.

66552508474436 is a deficient number, since it is larger than the sum of its proper divisors (51115070942392).

66552508474436 is a wasteful number, since it uses less digits than its factorization.

66552508474436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171527083798 (or 171527083796 counting only the distinct ones).

The product of its (nonzero) digits is 580608000, while the sum is 65.

The spelling of 66552508474436 in words is "sixty-six trillion, five hundred fifty-two billion, five hundred eight million, four hundred seventy-four thousand, four hundred thirty-six".