1665166110050 has 36 divisors (see below), whose sum is σ = 3290114741910. Its totient is φ = 626886059520.

The previous prime is 1665166110011. The next prime is 1665166110059. The reversal of 1665166110050 is 500116615661.

It can be written as a sum of positive squares in 9 ways, for example, as 590993475121 + 1074172634929 = 768761^2 + 1036423^2 .

It is a super-2 number, since 2×1665166110050² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1665166109986 and 1665166110013.

It is not an unprimeable number, because it can be changed into a prime (1665166110059) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 57603755 + ... + 57632654.

Almost surely, 2^{1665166110050} is an apocalyptic number.

1665166110050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665166110050 is a deficient number, since it is larger than the sum of its proper divisors (1624948631860).

1665166110050 is a wasteful number, since it uses less digits than its factorization.

1665166110050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115236455 (or 115236433 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 1665166110050 in words is "one trillion, six hundred sixty-five billion, one hundred sixty-six million, one hundred ten thousand, fifty".