30505120665 has 16 divisors (see below), whose sum is σ = 48841008000. Its totient is φ = 16258459392.

The previous prime is 30505120651. The next prime is 30505120721. The reversal of 30505120665 is 56602150503.

It is not a de Polignac number, because 30505120665 - 2⁶ = 30505120601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660565 + ... + 705234.

It is an arithmetic number, because the mean of its divisors is an integer number (3052563000).

Almost surely, 2^30505120665 is an apocalyptic number.

It is an amenable number.

30505120665 is a deficient number, since it is larger than the sum of its proper divisors (18335887335).

30505120665 is a wasteful number, since it uses less digits than its factorization.

30505120665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367296.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 30505120665 in words is "thirty billion, five hundred five million, one hundred twenty thousand, six hundred sixty-five".