1081668146 has 32 divisors (see below), whose sum is σ = 1869240240. Its totient is φ = 465002496.

The previous prime is 1081668131. The next prime is 1081668209. The reversal of 1081668146 is 6418661801.

It can be written as a sum of positive squares in 8 ways, for example, as 196308121 + 885360025 = 14011^2 + 29755^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30260 + ... + 55488.

Almost surely, 2^1081668146 is an apocalyptic number.

1081668146 is a deficient number, since it is larger than the sum of its proper divisors (787572094).

1081668146 is a wasteful number, since it uses less digits than its factorization.

1081668146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25358.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1081668146 is about 32888.7236906512. The cubic root of 1081668146 is about 1026.5135350731.

The spelling of 1081668146 in words is "one billion, eighty-one million, six hundred sixty-eight thousand, one hundred forty-six".