140220665 has 16 divisors (see below), whose sum is σ = 190747200. Its totient is φ = 98096832.

The previous prime is 140220659. The next prime is 140220667. The reversal of 140220665 is 566022041.

It is a cyclic number.

It is not a de Polignac number, because 140220665 - 2¹⁶ = 140155129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140220667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55535 + ... + 58004.

It is an arithmetic number, because the mean of its divisors is an integer number (11921700).

Almost surely, 2^140220665 is an apocalyptic number.

It is an amenable number.

140220665 is a deficient number, since it is larger than the sum of its proper divisors (50526535).

140220665 is a wasteful number, since it uses less digits than its factorization.

140220665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113576.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 140220665 is about 11841.4806928863. The cubic root of 140220665 is about 519.5220769093.

The spelling of 140220665 in words is "one hundred forty million, two hundred twenty thousand, six hundred sixty-five".