66646611006 has 16 divisors (see below), whose sum is σ = 133296013200. Its totient is φ = 22215071808.

The previous prime is 66646610993. The next prime is 66646611019. The reversal of 66646611006 is 60011664666.

66646611006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66646610993) and next prime (66646611019).

It is a super-3 number, since 3×66646611006³ (a number of 33 digits) contains 333 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, 320040 + ... + 485508.

It is an arithmetic number, because the mean of its divisors is an integer number (8331000825).

Almost surely, 2^66646611006 is an apocalyptic number.

66646611006 is an abundant number, since it is smaller than the sum of its proper divisors (66649402194).

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

66646611006 is a wasteful number, since it uses less digits than its factorization.

66646611006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232603.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 66646611006 in words is "sixty-six billion, six hundred forty-six million, six hundred eleven thousand, six".