7814506506666 has 16 divisors (see below), whose sum is σ = 15719354131104. Its totient is φ = 2589778649264.

The previous prime is 7814506506659. The next prime is 7814506506673. The reversal of 7814506506666 is 6666056054187.

It is an interprime number because it is at equal distance from previous prime (7814506506659) and next prime (7814506506673).

It is a super-2 number, since 2×7814506506666² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3764212116 + ... + 3764214191.

It is an arithmetic number, because the mean of its divisors is an integer number (982459633194).

Almost surely, 2^{7814506506666} is an apocalyptic number.

7814506506666 is an abundant number, since it is smaller than the sum of its proper divisors (7904847624438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7814506506666 is a wasteful number, since it uses less digits than its factorization.

7814506506666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528426485.

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 7814506506666 in words is "seven trillion, eight hundred fourteen billion, five hundred six million, five hundred six thousand, six hundred sixty-six".