66151071641527 has 4 divisors (see below), whose sum is σ = 66434981820480. Its totient is φ = 65867161462576.

The previous prime is 66151071641519. The next prime is 66151071641531. The reversal of 66151071641527 is 72514617015166.

It is a happy number.

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 66151071641527 - 2³ = 66151071641519 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 (66151071642527) 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, 141955089127 + ... + 141955089592.

It is an arithmetic number, because the mean of its divisors is an integer number (16608745455120).

Almost surely, 2^{66151071641527} is an apocalyptic number.

66151071641527 is a deficient number, since it is larger than the sum of its proper divisors (283910178953).

66151071641527 is a wasteful number, since it uses less digits than its factorization.

66151071641527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283910178952.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 66151071641527 in words is "sixty-six trillion, one hundred fifty-one billion, seventy-one million, six hundred forty-one thousand, five hundred twenty-seven".