140783666 has 16 divisors (see below), whose sum is σ = 214950456. Its totient is φ = 69144576.

The previous prime is 140783653. The next prime is 140783689. The reversal of 140783666 is 666387041.

It can be written as a sum of positive squares in 4 ways, for example, as 135047641 + 5736025 = 11621^2 + 2395^2 .

It is a super-2 number, since 2×140783666² = 39640081224799112, which 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, 23930 + ... + 29226.

Almost surely, 2^140783666 is an apocalyptic number.

140783666 is a deficient number, since it is larger than the sum of its proper divisors (74166790).

140783666 is a wasteful number, since it uses less digits than its factorization.

140783666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5533.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 140783666 is about 11865.2292856059. The cubic root of 140783666 is about 520.2164606703.

The spelling of 140783666 in words is "one hundred forty million, seven hundred eighty-three thousand, six hundred sixty-six".