1011511666166 has 16 divisors (see below), whose sum is σ = 1648643804160. Its totient is φ = 463681068840.

The previous prime is 1011511666159. The next prime is 1011511666169. The reversal of 1011511666166 is 6616661151101.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011511666169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429333146 + ... + 429335501.

It is an arithmetic number, because the mean of its divisors is an integer number (103040237760).

Almost surely, 2^{1011511666166} is an apocalyptic number.

1011511666166 is a deficient number, since it is larger than the sum of its proper divisors (637132137994).

1011511666166 is a wasteful number, since it uses less digits than its factorization.

1011511666166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858668699.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 1011511666166 in words is "one trillion, eleven billion, five hundred eleven million, six hundred sixty-six thousand, one hundred sixty-six".