30666697628 has 144 divisors (see below), whose sum is σ = 66092019840. Its totient is φ = 12395980800.

The previous prime is 30666697609. The next prime is 30666697637. The reversal of 30666697628 is 82679666603.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83560301 + ... + 83560667.

It is an arithmetic number, because the mean of its divisors is an integer number (458972360).

Almost surely, 2^30666697628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30666697628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33046009920).

30666697628 is an abundant number, since it is smaller than the sum of its proper divisors (35425322212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30666697628 is a wasteful number, since it uses less digits than its factorization.

30666697628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 30666697628 in words is "thirty billion, six hundred sixty-six million, six hundred ninety-seven thousand, six hundred twenty-eight".