16662540 has 48 divisors (see below), whose sum is σ = 46851840. Its totient is φ = 4424640.

The previous prime is 16662517. The next prime is 16662551. The reversal of 16662540 is 4526661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 16662498 and 16662507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19441 + ... + 20279.

It is an arithmetic number, because the mean of its divisors is an integer number (976080).

Almost surely, 2^16662540 is an apocalyptic number.

16662540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16662540 is an abundant number, since it is smaller than the sum of its proper divisors (30189300).

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

16662540 is a wasteful number, since it uses less digits than its factorization.

16662540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1180 counting only the distinct ones).

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

The square root of 16662540 is about 4081.9774619662. The cubic root of 16662540 is about 255.4153937004.

The spelling of 16662540 in words is "sixteen million, six hundred sixty-two thousand, five hundred forty".