666707040407 has 8 divisors (see below), whose sum is σ = 686543945472. Its totient is φ = 647040409600.

The previous prime is 666707040403. The next prime is 666707040469. The reversal of 666707040407 is 704040707666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666707040407 - 2² = 666707040403 is a prime.

It is a super-2 number, since 2×666707040407² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666707040403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42560618 + ... + 42576279.

It is an arithmetic number, because the mean of its divisors is an integer number (85817993184).

Almost surely, 2^666707040407 is an apocalyptic number.

666707040407 is a deficient number, since it is larger than the sum of its proper divisors (19836905065).

666707040407 is a wasteful number, since it uses less digits than its factorization.

666707040407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85137129.

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 666707040407 in words is "six hundred sixty-six billion, seven hundred seven million, forty thousand, four hundred seven".