666740740334 has 16 divisors (see below), whose sum is σ = 1009717249200. Its totient is φ = 330170935104.

The previous prime is 666740740307. The next prime is 666740740381. The reversal of 666740740334 is 433047047666.

It is a super-2 number, since 2×666740740334² (a number of 24 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 7 ways as a sum of consecutive naturals, for example, 139919 + ... + 1163210.

It is an arithmetic number, because the mean of its divisors is an integer number (63107328075).

Almost surely, 2^666740740334 is an apocalyptic number.

666740740334 is a deficient number, since it is larger than the sum of its proper divisors (342976508866).

666740740334 is a wasteful number, since it uses less digits than its factorization.

666740740334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305587.

The product of its (nonzero) digits is 6096384, while the sum is 50.

The spelling of 666740740334 in words is "six hundred sixty-six billion, seven hundred forty million, seven hundred forty thousand, three hundred thirty-four".