665162157251 has 2 divisors, whose sum is σ = 665162157252. Its totient is φ = 665162157250.

The previous prime is 665162157221. The next prime is 665162157263. The reversal of 665162157251 is 152751261566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665162157251 - 2²² = 665157962947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665162157196 and 665162157205.

It is not a weakly prime, because it can be changed into another prime (665162157221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332581078625 + 332581078626.

It is an arithmetic number, because the mean of its divisors is an integer number (332581078626).

Almost surely, 2^665162157251 is an apocalyptic number.

665162157251 is a deficient number, since it is larger than the sum of its proper divisors (1).

665162157251 is an equidigital number, since it uses as much as digits as its factorization.

665162157251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 47.

The spelling of 665162157251 in words is "six hundred sixty-five billion, one hundred sixty-two million, one hundred fifty-seven thousand, two hundred fifty-one".