140003661 has 8 divisors (see below), whose sum is σ = 213338944. Its totient is φ = 80002080.

The previous prime is 140003659. The next prime is 140003711. The reversal of 140003661 is 166300041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140003661 - 2¹ = 140003659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 6666841 = 140003661 / (1 + 4 + 0 + 0 + 0 + 3 + 6 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140003261) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3333400 + ... + 3333441.

It is an arithmetic number, because the mean of its divisors is an integer number (26667368).

Almost surely, 2^140003661 is an apocalyptic number.

It is an amenable number.

140003661 is a deficient number, since it is larger than the sum of its proper divisors (73335283).

140003661 is an equidigital number, since it uses as much as digits as its factorization.

140003661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666851.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 140003661 is about 11832.3142706742. The cubic root of 140003661 is about 519.2539362697.

The spelling of 140003661 in words is "one hundred forty million, three thousand, six hundred sixty-one".