140665613 has 4 divisors (see below), whose sum is σ = 153453408. Its totient is φ = 127877820.

The previous prime is 140665597. The next prime is 140665627. The reversal of 140665613 is 316566041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140665613 - 2⁴ = 140665597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140665613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140665663) 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 3 ways as a sum of consecutive naturals, for example, 6393881 + ... + 6393902.

It is an arithmetic number, because the mean of its divisors is an integer number (38363352).

Almost surely, 2^140665613 is an apocalyptic number.

It is an amenable number.

140665613 is a deficient number, since it is larger than the sum of its proper divisors (12787795).

140665613 is a wasteful number, since it uses less digits than its factorization.

140665613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12787794.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 140665613 is about 11860.2534964477. The cubic root of 140665613 is about 520.0710122448.

The spelling of 140665613 in words is "one hundred forty million, six hundred sixty-five thousand, six hundred thirteen".