16722656 has 24 divisors (see below), whose sum is σ = 34355664. Its totient is φ = 7997440.

The previous prime is 16722653. The next prime is 16722661. The reversal of 16722656 is 65622761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16722653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10625 + ... + 12096.

It is an arithmetic number, because the mean of its divisors is an integer number (1431486).

Almost surely, 2^16722656 is an apocalyptic number.

16722656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16722656 is an abundant number, since it is smaller than the sum of its proper divisors (17633008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16722656 is a wasteful number, since it uses less digits than its factorization.

16722656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22754 (or 22746 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 16722656 is about 4089.3344201716. The cubic root of 16722656 is about 255.7221921251.

The spelling of 16722656 in words is "sixteen million, seven hundred twenty-two thousand, six hundred fifty-six".