1066640471406 has 12 divisors (see below), whose sum is σ = 2311054354752. Its totient is φ = 355546823796.

The previous prime is 1066640471263. The next prime is 1066640471443. The reversal of 1066640471406 is 6041740466601.

It is a super-4 number, since 4×1066640471406⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29628901966 + ... + 29628902001.

It is an arithmetic number, because the mean of its divisors is an integer number (192587862896).

Almost surely, 2^{1066640471406} is an apocalyptic number.

1066640471406 is an abundant number, since it is smaller than the sum of its proper divisors (1244413883346).

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

1066640471406 is a wasteful number, since it uses less digits than its factorization.

1066640471406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59257803975 (or 59257803972 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 1066640471406 in words is "one trillion, sixty-six billion, six hundred forty million, four hundred seventy-one thousand, four hundred six".