6653642 has 4 divisors (see below), whose sum is σ = 9980466. Its totient is φ = 3326820.

The previous prime is 6653641. The next prime is 6653653. The reversal of 6653642 is 2463566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6651241 + 2401 = 2579^2 + 49^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6653599 and 6653608.

It is not an unprimeable number, because it can be changed into a prime (6653641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1663409 + ... + 1663412.

Almost surely, 2^6653642 is an apocalyptic number.

6653642 is a deficient number, since it is larger than the sum of its proper divisors (3326824).

6653642 is a wasteful number, since it uses less digits than its factorization.

6653642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326823.

The product of its digits is 25920, while the sum is 32.

The square root of 6653642 is about 2579.4654484990. The cubic root of 6653642 is about 188.0845590639.

The spelling of 6653642 in words is "six million, six hundred fifty-three thousand, six hundred forty-two".