6634668640731 has 32 divisors (see below), whose sum is σ = 8914878543168. Its totient is φ = 4388938137600.

The previous prime is 6634668640727. The next prime is 6634668640751. The reversal of 6634668640731 is 1370468664366.

It is not a de Polignac number, because 6634668640731 - 2² = 6634668640727 is a prime.

It is a super-2 number, since 2×6634668640731² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6634668640751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307477215 + ... + 307498791.

It is an arithmetic number, because the mean of its divisors is an integer number (278589954474).

Almost surely, 2^{6634668640731} is an apocalyptic number.

6634668640731 is a deficient number, since it is larger than the sum of its proper divisors (2280209902437).

6634668640731 is a wasteful number, since it uses less digits than its factorization.

6634668640731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23311.

The product of its (nonzero) digits is 62705664, while the sum is 60.

The spelling of 6634668640731 in words is "six trillion, six hundred thirty-four billion, six hundred sixty-eight million, six hundred forty thousand, seven hundred thirty-one".