6651923 has 2 divisors, whose sum is σ = 6651924. Its totient is φ = 6651922.

The previous prime is 6651907. The next prime is 6651941. The reversal of 6651923 is 3291566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6651923 - 2⁴ = 6651907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6651923.

It is not a weakly prime, because it can be changed into another prime (6651223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325961 + 3325962.

It is an arithmetic number, because the mean of its divisors is an integer number (3325962).

Almost surely, 2^6651923 is an apocalyptic number.

6651923 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651923 is an equidigital number, since it uses as much as digits as its factorization.

6651923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 6651923 is about 2579.1322184022. The cubic root of 6651923 is about 188.0683601559.

The spelling of 6651923 in words is "six million, six hundred fifty-one thousand, nine hundred twenty-three".