665156273414446 has 64 divisors (see below), whose sum is σ = 1128359452999680. Its totient is φ = 291442191636960.

The previous prime is 665156273414411. The next prime is 665156273414459. The reversal of 665156273414446 is 644414372651566.

665156273414446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×665156273414446² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162921555 + ... + 166954321.

It is an arithmetic number, because the mean of its divisors is an integer number (17630616453120).

Almost surely, 2^{665156273414446} is an apocalyptic number.

665156273414446 is a deficient number, since it is larger than the sum of its proper divisors (463203179585234).

665156273414446 is a wasteful number, since it uses less digits than its factorization.

665156273414446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035109.

The product of its digits is 348364800, while the sum is 64.

It can be divided in two parts, 6651562 and 73414446, that added together give a palindrome (80066008).

The spelling of 665156273414446 in words is "six hundred sixty-five trillion, one hundred fifty-six billion, two hundred seventy-three million, four hundred fourteen thousand, four hundred forty-six".