16660425 has 48 divisors (see below), whose sum is σ = 29730240. Its totient is φ = 8202240.

The previous prime is 16660417. The next prime is 16660439. The reversal of 16660425 is 52406661.

It is not a de Polignac number, because 16660425 - 2³ = 16660417 is a prime.

It is a super-2 number, since 2×16660425² = 555139522361250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16660392 and 16660401.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92986 + ... + 93164.

It is an arithmetic number, because the mean of its divisors is an integer number (619380).

Almost surely, 2^16660425 is an apocalyptic number.

16660425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16660425 is a deficient number, since it is larger than the sum of its proper divisors (13069815).

16660425 is a wasteful number, since it uses less digits than its factorization.

16660425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 16660425 is about 4081.7183881302. The cubic root of 16660425 is about 255.4045864962.

The spelling of 16660425 in words is "sixteen million, six hundred sixty thousand, four hundred twenty-five".