1206667166571 has 48 divisors (see below), whose sum is σ = 1853034019200. Its totient is φ = 754035220224.

The previous prime is 1206667166543. The next prime is 1206667166591. The reversal of 1206667166571 is 1756617666021.

It is a happy number.

It is not a de Polignac number, because 1206667166571 - 2⁷ = 1206667166443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1206667166591) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45591940 + ... + 45618398.

It is an arithmetic number, because the mean of its divisors is an integer number (38604875400).

Almost surely, 2^{1206667166571} is an apocalyptic number.

1206667166571 is a deficient number, since it is larger than the sum of its proper divisors (646366852629).

1206667166571 is a wasteful number, since it uses less digits than its factorization.

1206667166571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27688 (or 27685 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 1206667166571 in words is "one trillion, two hundred six billion, six hundred sixty-seven million, one hundred sixty-six thousand, five hundred seventy-one".