1066611166550 has 48 divisors (see below), whose sum is σ = 2060333195712. Its totient is φ = 410502708000.

The previous prime is 1066611166501. The next prime is 1066611166597. The reversal of 1066611166550 is 556611166601.

It is a super-2 number, since 2×1066611166550² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3558176 + ... + 3846275.

It is an arithmetic number, because the mean of its divisors is an integer number (42923608244).

Almost surely, 2^{1066611166550} is an apocalyptic number.

1066611166550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1066611166550 is a deficient number, since it is larger than the sum of its proper divisors (993722029162).

1066611166550 is a wasteful number, since it uses less digits than its factorization.

1066611166550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404573 (or 7404568 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 1066611166550 in words is "one trillion, sixty-six billion, six hundred eleven million, one hundred sixty-six thousand, five hundred fifty".