30120666447 has 8 divisors (see below), whose sum is σ = 40254071040. Its totient is φ = 20033853080.

The previous prime is 30120666413. The next prime is 30120666449. The reversal of 30120666447 is 74466602103.

It is a happy number.

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 30120666447 - 2⁶ = 30120666383 is a prime.

It is a super-2 number, since 2×30120666447² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120666449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11646297 + ... + 11648882.

It is an arithmetic number, because the mean of its divisors is an integer number (5031758880).

Almost surely, 2^30120666447 is an apocalyptic number.

30120666447 is a deficient number, since it is larger than the sum of its proper divisors (10133404593).

30120666447 is a wasteful number, since it uses less digits than its factorization.

30120666447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23295613.

The product of its (nonzero) digits is 145152, while the sum is 39.

It can be divided in two parts, 301206 and 66447, that added together give a triangular number (367653 = T₈₅₇).

The spelling of 30120666447 in words is "thirty billion, one hundred twenty million, six hundred sixty-six thousand, four hundred forty-seven".