66155505665151 has 8 divisors (see below), whose sum is σ = 100808389585024. Its totient is φ = 37803146094360.

The previous prime is 66155505665099. The next prime is 66155505665159. The reversal of 66155505665151 is 15156650555166.

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

It is not a de Polignac number, because 66155505665151 - 2¹¹ = 66155505663103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66155505665091 and 66155505665100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155505665159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1575131087245 + ... + 1575131087286.

It is an arithmetic number, because the mean of its divisors is an integer number (12601048698128).

Almost surely, 2^{66155505665151} is an apocalyptic number.

66155505665151 is a deficient number, since it is larger than the sum of its proper divisors (34652883919873).

66155505665151 is a wasteful number, since it uses less digits than its factorization.

66155505665151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150262174541.

The product of its (nonzero) digits is 20250000, while the sum is 57.

It can be divided in two parts, 66155 and 505665151, that added together give a triangular number (505731306 = T₃₁₈₀₃).

The spelling of 66155505665151 in words is "sixty-six trillion, one hundred fifty-five billion, five hundred five million, six hundred sixty-five thousand, one hundred fifty-one".