66155600002 has 8 divisors (see below), whose sum is σ = 99619522956. Its totient is φ = 32949092352.

The previous prime is 66155599997. The next prime is 66155600009. The reversal of 66155600002 is 20000655166.

66155600002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 63070797321 + 3084802681 = 251139^2 + 55541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66155600009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64353183 + ... + 64354210.

Almost surely, 2^66155600002 is an apocalyptic number.

66155600002 is a deficient number, since it is larger than the sum of its proper divisors (33463922954).

66155600002 is a wasteful number, since it uses less digits than its factorization.

66155600002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128707652.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 66155600002 in words is "sixty-six billion, one hundred fifty-five million, six hundred thousand, two".