9663921730 has 32 divisors (see below), whose sum is σ = 18157177728. Its totient is φ = 3696316800.

The previous prime is 9663921727. The next prime is 9663921731. The reversal of 9663921730 is 371293669.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (9663921731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129870 + ... + 1138390.

It is an arithmetic number, because the mean of its divisors is an integer number (567411804).

Almost surely, 2^9663921730 is an apocalyptic number.

9663921730 is a deficient number, since it is larger than the sum of its proper divisors (8493255998).

9663921730 is a wasteful number, since it uses less digits than its factorization.

9663921730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13482.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 9663921730 is about 98305.2477236083. The cubic root of 9663921730 is about 2130.0238581677.

The spelling of 9663921730 in words is "nine billion, six hundred sixty-three million, nine hundred twenty-one thousand, seven hundred thirty".