665666134 has 16 divisors (see below), whose sum is σ = 1152223488. Its totient is φ = 282515112.

The previous prime is 665666129. The next prime is 665666171. The reversal of 665666134 is 431666566.

665666134 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 2×665666134² = 886222803909011912, which 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 7 ways as a sum of consecutive naturals, for example, 229372 + ... + 232255.

It is an arithmetic number, because the mean of its divisors is an integer number (72013968).

Almost surely, 2^665666134 is an apocalyptic number.

665666134 is a deficient number, since it is larger than the sum of its proper divisors (486557354).

665666134 is a wasteful number, since it uses less digits than its factorization.

665666134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461739.

The product of its digits is 466560, while the sum is 43.

The square root of 665666134 is about 25800.5064678971. The cubic root of 665666134 is about 873.1432230300.

The spelling of 665666134 in words is "six hundred sixty-five million, six hundred sixty-six thousand, one hundred thirty-four".