221665140050765 has 8 divisors (see below), whose sum is σ = 266073585765120. Its totient is φ = 177281833571152.

The previous prime is 221665140050719. The next prime is 221665140050843. The reversal of 221665140050765 is 567050041566122.

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

It is a cyclic number.

It is not a de Polignac number, because 221665140050765 - 2¹⁸ = 221665139788621 is a prime.

It is a congruent number.

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, 6284789285 + ... + 6284824554.

It is an arithmetic number, because the mean of its divisors is an integer number (33259198220640).

Almost surely, 2^{221665140050765} is an apocalyptic number.

It is an amenable number.

221665140050765 is a deficient number, since it is larger than the sum of its proper divisors (44408445714355).

221665140050765 is a wasteful number, since it uses less digits than its factorization.

221665140050765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12569617371.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 221665140050765 in words is "two hundred twenty-one trillion, six hundred sixty-five billion, one hundred forty million, fifty thousand, seven hundred sixty-five".