666006539695 has 32 divisors (see below), whose sum is σ = 931966886016. Its totient is φ = 447455232000.

The previous prime is 666006539689. The next prime is 666006539719. The reversal of 666006539695 is 596935600666.

666006539695 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666006539695 - 2⁷ = 666006539567 is a prime.

It is a super-2 number, since 2×666006539695² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58206 + ... + 1155595.

It is an arithmetic number, because the mean of its divisors is an integer number (29123965188).

Almost surely, 2^666006539695 is an apocalyptic number.

666006539695 is a deficient number, since it is larger than the sum of its proper divisors (265960346321).

666006539695 is a wasteful number, since it uses less digits than its factorization.

666006539695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214131.

The product of its (nonzero) digits is 47239200, while the sum is 61.

The spelling of 666006539695 in words is "six hundred sixty-six billion, six million, five hundred thirty-nine thousand, six hundred ninety-five".