16642506 has 16 divisors (see below), whose sum is σ = 33406848. Its totient is φ = 5527200.

The previous prime is 16642481. The next prime is 16642513. The reversal of 16642506 is 60524661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3250 + ... + 6621.

It is an arithmetic number, because the mean of its divisors is an integer number (2087928).

Almost surely, 2^16642506 is an apocalyptic number.

16642506 is an abundant number, since it is smaller than the sum of its proper divisors (16764342).

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

16642506 is a wasteful number, since it uses less digits than its factorization.

16642506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10157.

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

The square root of 16642506 is about 4079.5227662069. The cubic root of 16642506 is about 255.3129874615.

The spelling of 16642506 in words is "sixteen million, six hundred forty-two thousand, five hundred six".