6651731427 has 48 divisors (see below), whose sum is σ = 9891458976. Its totient is φ = 3972672000.

The previous prime is 6651731419. The next prime is 6651731441. The reversal of 6651731427 is 7241371566.

It is a happy number.

6651731427 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6651731427 - 2³ = 6651731419 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (211680) is a multiple of the sum of its prime factors (980).

It is not an unprimeable number, because it can be changed into a prime (6651731417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14554983 + ... + 14555439.

It is an arithmetic number, because the mean of its divisors is an integer number (206072062).

Almost surely, 2^6651731427 is an apocalyptic number.

6651731427 is a deficient number, since it is larger than the sum of its proper divisors (3239727549).

6651731427 is a wasteful number, since it uses less digits than its factorization.

6651731427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 969 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The square root of 6651731427 is about 81558.1475206493. The cubic root of 6651731427 is about 1880.6655470472.

The spelling of 6651731427 in words is "six billion, six hundred fifty-one million, seven hundred thirty-one thousand, four hundred twenty-seven".