30638657066 has 8 divisors (see below), whose sum is σ = 46191275460. Its totient is φ = 15241565248.

The previous prime is 30638657053. The next prime is 30638657069. The reversal of 30638657066 is 66075683603.

It can be written as a sum of positive squares in 2 ways, for example, as 30600155041 + 38502025 = 174929^2 + 6205^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30638657069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38881151 + ... + 38881938.

Almost surely, 2^30638657066 is an apocalyptic number.

30638657066 is a deficient number, since it is larger than the sum of its proper divisors (15552618394).

30638657066 is a wasteful number, since it uses less digits than its factorization.

30638657066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77763288.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 30638657066 in words is "thirty billion, six hundred thirty-eight million, six hundred fifty-seven thousand, sixty-six".