665566056151 has 8 divisors (see below), whose sum is σ = 705058245680. Its totient is φ = 626520106368.

The previous prime is 665566056139. The next prime is 665566056157. The reversal of 665566056151 is 151650665566.

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

It is a cyclic number.

It is not a de Polignac number, because 665566056151 - 2¹⁵ = 665566023383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665566056157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111556866 + ... + 111562831.

It is an arithmetic number, because the mean of its divisors is an integer number (88132280710).

Almost surely, 2^665566056151 is an apocalyptic number.

665566056151 is a deficient number, since it is larger than the sum of its proper divisors (39492189529).

665566056151 is a wasteful number, since it uses less digits than its factorization.

665566056151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223119873.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 665566056151 in words is "six hundred sixty-five billion, five hundred sixty-six million, fifty-six thousand, one hundred fifty-one".