6723658 has 4 divisors (see below), whose sum is σ = 10085490. Its totient is φ = 3361828.

The previous prime is 6723643. The next prime is 6723667. The reversal of 6723658 is 8563276.

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., 6723649 + 9 = 2593^2 + 3^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1680913 + ... + 1680916.

Almost surely, 2^6723658 is an apocalyptic number.

6723658 is a deficient number, since it is larger than the sum of its proper divisors (3361832).

6723658 is a wasteful number, since it uses less digits than its factorization.

6723658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361831.

The product of its digits is 60480, while the sum is 37.

The square root of 6723658 is about 2593.0017354410. The cubic root of 6723658 is about 188.7419937250.

It can be divided in two parts, 6723 and 658, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6723658 in words is "six million, seven hundred twenty-three thousand, six hundred fifty-eight".