66560155551151 has 2 divisors, whose sum is σ = 66560155551152. Its totient is φ = 66560155551150.

The previous prime is 66560155551137. The next prime is 66560155551167. The reversal of 66560155551151 is 15115555106566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66560155551151 - 2²⁷ = 66560021333423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66560155551251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33280077775575 + 33280077775576.

It is an arithmetic number, because the mean of its divisors is an integer number (33280077775576).

Almost surely, 2^{66560155551151} is an apocalyptic number.

66560155551151 is a deficient number, since it is larger than the sum of its proper divisors (1).

66560155551151 is an equidigital number, since it uses as much as digits as its factorization.

66560155551151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375000, while the sum is 52.

The spelling of 66560155551151 in words is "sixty-six trillion, five hundred sixty billion, one hundred fifty-five million, five hundred fifty-one thousand, one hundred fifty-one".