30663666397 has 24 divisors (see below), whose sum is σ = 38315831424. Its totient is φ = 24025719744.

The previous prime is 30663666373. The next prime is 30663666409. The reversal of 30663666397 is 79366636603.

It is not a de Polignac number, because 30663666397 - 2³¹ = 28516182749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30663666367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3978 + ... + 247675.

It is an arithmetic number, because the mean of its divisors is an integer number (1596492976).

Almost surely, 2^30663666397 is an apocalyptic number.

It is an amenable number.

30663666397 is a deficient number, since it is larger than the sum of its proper divisors (7652165027).

30663666397 is a wasteful number, since it uses less digits than its factorization.

30663666397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251789 (or 251776 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 55.

The spelling of 30663666397 in words is "thirty billion, six hundred sixty-three million, six hundred sixty-six thousand, three hundred ninety-seven".