665641163414 has 32 divisors (see below), whose sum is σ = 1067265987840. Its totient is φ = 310670236800.

The previous prime is 665641163413. The next prime is 665641163437. The reversal of 665641163414 is 414361146566.

It is a super-2 number, since 2×665641163414² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665641163413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1638644 + ... + 2004104.

It is an arithmetic number, because the mean of its divisors is an integer number (33352062120).

Almost surely, 2^665641163414 is an apocalyptic number.

665641163414 is a deficient number, since it is larger than the sum of its proper divisors (401624824426).

665641163414 is a wasteful number, since it uses less digits than its factorization.

665641163414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366536.

The product of its digits is 1244160, while the sum is 47.

The spelling of 665641163414 in words is "six hundred sixty-five billion, six hundred forty-one million, one hundred sixty-three thousand, four hundred fourteen".