166165501010 has 16 divisors (see below), whose sum is σ = 299278437336. Its totient is φ = 66426081408.

The previous prime is 166165500983. The next prime is 166165501031. The reversal of 166165501010 is 10105561661.

It can be written as a sum of positive squares in 4 ways, for example, as 105107585209 + 61057915801 = 324203^2 + 247099^2 .

It is a super-2 number, since 2×166165501010² (a number of 23 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, 4997477 + ... + 5030616.

Almost surely, 2^166165501010 is an apocalyptic number.

166165501010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166165501010 is a deficient number, since it is larger than the sum of its proper divisors (133112936326).

166165501010 is a wasteful number, since it uses less digits than its factorization.

166165501010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029757.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 166165501010 in words is "one hundred sixty-six billion, one hundred sixty-five million, five hundred one thousand, ten".