66500556151 has 4 divisors (see below), whose sum is σ = 66834730000. Its totient is φ = 66166382304.

The previous prime is 66500556127. The next prime is 66500556163. The reversal of 66500556151 is 15165500566.

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

It is a cyclic number.

It is not a de Polignac number, because 66500556151 - 2¹¹ = 66500554103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500556181) 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, 167086626 + ... + 167087023.

It is an arithmetic number, because the mean of its divisors is an integer number (16708682500).

Almost surely, 2^66500556151 is an apocalyptic number.

66500556151 is a deficient number, since it is larger than the sum of its proper divisors (334173849).

66500556151 is a wasteful number, since it uses less digits than its factorization.

66500556151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334173848.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 66500556151 in words is "sixty-six billion, five hundred million, five hundred fifty-six thousand, one hundred fifty-one".