16716720 has 40 divisors (see below), whose sum is σ = 51822576. Its totient is φ = 4457728.

The previous prime is 16716709. The next prime is 16716727. The reversal of 16716720 is 2761761.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is not an unprimeable number, because it can be changed into a prime (16716727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34587 + ... + 35066.

Almost surely, 2^16716720 is an apocalyptic number.

16716720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16716720 is an abundant number, since it is smaller than the sum of its proper divisors (35105856).

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

16716720 is a wasteful number, since it uses less digits than its factorization.

16716720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69669 (or 69663 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 16716720 is about 4088.6085652701. The cubic root of 16716720 is about 255.6919308521.

The spelling of 16716720 in words is "sixteen million, seven hundred sixteen thousand, seven hundred twenty".