1066171621610 has 16 divisors (see below), whose sum is σ = 1919643107976. Its totient is φ = 426349939968.

The previous prime is 1066171621601. The next prime is 1066171621643. The reversal of 1066171621610 is 161261716601.

It can be written as a sum of positive squares in 4 ways, for example, as 916295016289 + 149876605321 = 957233^2 + 387139^2 .

It is a super-2 number, since 2×1066171621610² (a number of 25 digits) contains 22 as substring.

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, 14800859 + ... + 14872718.

Almost surely, 2^{1066171621610} is an apocalyptic number.

1066171621610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1066171621610 is a deficient number, since it is larger than the sum of its proper divisors (853471486366).

1066171621610 is a wasteful number, since it uses less digits than its factorization.

1066171621610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29677177.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 1066171621610 in words is "one trillion, sixty-six billion, one hundred seventy-one million, six hundred twenty-one thousand, six hundred ten".