6647954 has 4 divisors (see below), whose sum is σ = 9971934. Its totient is φ = 3323976.

The previous prime is 6647951. The next prime is 6647959. The reversal of 6647954 is 4597466.

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., 5593225 + 1054729 = 2365^2 + 1027^2 .

It is a super-2 number, since 2×6647954² = 88390584772232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6647951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661987 + ... + 1661990.

Almost surely, 2^6647954 is an apocalyptic number.

6647954 is a deficient number, since it is larger than the sum of its proper divisors (3323980).

6647954 is a wasteful number, since it uses less digits than its factorization.

6647954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323979.

The product of its digits is 181440, while the sum is 41.

The square root of 6647954 is about 2578.3626587429. The cubic root of 6647954 is about 188.0309478251.

The spelling of 6647954 in words is "six million, six hundred forty-seven thousand, nine hundred fifty-four".