66556522422602 has 4 divisors (see below), whose sum is σ = 99834783633906. Its totient is φ = 33278261211300.

The previous prime is 66556522422589. The next prime is 66556522422653. The reversal of 66556522422602 is 20622422565566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33682364929801 + 32874157492801 = 5803651^2 + 5733599^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16639130605649 + ... + 16639130605652.

Almost surely, 2^{66556522422602} is an apocalyptic number.

66556522422602 is a deficient number, since it is larger than the sum of its proper divisors (33278261211304).

66556522422602 is a wasteful number, since it uses less digits than its factorization.

66556522422602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33278261211303.

The product of its (nonzero) digits is 20736000, while the sum is 53.

The spelling of 66556522422602 in words is "sixty-six trillion, five hundred fifty-six billion, five hundred twenty-two million, four hundred twenty-two thousand, six hundred two".