16626825 has 18 divisors (see below), whose sum is σ = 29780894. Its totient is φ = 8867520.

The previous prime is 16626823. The next prime is 16626829. The reversal of 16626825 is 52862661.

16626825 is a `hidden beast` number, since 1 + 6 + 626 + 8 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2064969 + 14561856 = 1437^2 + 3816^2 .

It is not a de Polignac number, because 16626825 - 2¹ = 16626823 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 16626825.

It is not an unprimeable number, because it can be changed into a prime (16626823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36724 + ... + 37173.

Almost surely, 2^16626825 is an apocalyptic number.

16626825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16626825 is a deficient number, since it is larger than the sum of its proper divisors (13154069).

16626825 is a wasteful number, since it uses less digits than its factorization.

16626825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73913 (or 73905 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 16626825 is about 4077.6003972925. The cubic root of 16626825 is about 255.2327747613.

The spelling of 16626825 in words is "sixteen million, six hundred twenty-six thousand, eight hundred twenty-five".