140161066 has 4 divisors (see below), whose sum is σ = 210241602. Its totient is φ = 70080532.

The previous prime is 140161051. The next prime is 140161093. The reversal of 140161066 is 660161041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660161041 = 1303 ⋅506647.

It can be written as a sum of positive squares in only one way, i.e., 138650625 + 1510441 = 11775^2 + 1229^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140161066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35040265 + ... + 35040268.

Almost surely, 2^140161066 is an apocalyptic number.

140161066 is a deficient number, since it is larger than the sum of its proper divisors (70080536).

140161066 is an equidigital number, since it uses as much as digits as its factorization.

140161066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70080535.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 140161066 is about 11838.9638904762. The cubic root of 140161066 is about 519.4484610741.

Subtracting from 140161066 its sum of digits (25), we obtain a palindrome (140161041).

The spelling of 140161066 in words is "one hundred forty million, one hundred sixty-one thousand, sixty-six".