265161252646166 has 4 divisors (see below), whose sum is σ = 397741878969252. Its totient is φ = 132580626323082.

The previous prime is 265161252646123. The next prime is 265161252646183. The reversal of 265161252646166 is 661646252161562.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 66290313161540 + ... + 66290313161543.

It is an arithmetic number, because the mean of its divisors is an integer number (99435469742313).

Almost surely, 2^{265161252646166} is an apocalyptic number.

265161252646166 is a deficient number, since it is larger than the sum of its proper divisors (132580626323086).

265161252646166 is a wasteful number, since it uses less digits than its factorization.

265161252646166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132580626323085.

The product of its digits is 37324800, while the sum is 59.

The spelling of 265161252646166 in words is "two hundred sixty-five trillion, one hundred sixty-one billion, two hundred fifty-two million, six hundred forty-six thousand, one hundred sixty-six".