6645754 has 4 divisors (see below), whose sum is σ = 9968634. Its totient is φ = 3322876.

The previous prime is 6645739. The next prime is 6645757. The reversal of 6645754 is 4575466.

It is a happy number.

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., 6630625 + 15129 = 2575^2 + 123^2 .

It is not an unprimeable number, because it can be changed into a prime (6645757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661437 + ... + 1661440.

Almost surely, 2^6645754 is an apocalyptic number.

6645754 is a deficient number, since it is larger than the sum of its proper divisors (3322880).

6645754 is a wasteful number, since it uses less digits than its factorization.

6645754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322879.

The product of its digits is 100800, while the sum is 37.

The square root of 6645754 is about 2577.9359961023. The cubic root of 6645754 is about 188.0102039127.

The spelling of 6645754 in words is "six million, six hundred forty-five thousand, seven hundred fifty-four".