666666740001 has 16 divisors (see below), whose sum is σ = 891934927488. Its totient is φ = 442922284800.

The previous prime is 666666739967. The next prime is 666666740057. The reversal of 666666740001 is 100047666666.

It is not a de Polignac number, because 666666740001 - 2¹⁰ = 666666738977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666666740101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3483516 + ... + 3669906.

It is an arithmetic number, because the mean of its divisors is an integer number (55745932968).

Almost surely, 2^666666740001 is an apocalyptic number.

It is an amenable number.

666666740001 is a deficient number, since it is larger than the sum of its proper divisors (225268187487).

666666740001 is a wasteful number, since it uses less digits than its factorization.

666666740001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190472.

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 666666740001 in words is "six hundred sixty-six billion, six hundred sixty-six million, seven hundred forty thousand, one".