16722667520 has 96 divisors (see below), whose sum is σ = 43211455560. Its totient is φ = 6174474240.

The previous prime is 16722667517. The next prime is 16722667529. The reversal of 16722667520 is 2576622761.

It can be written as a sum of positive squares in 4 ways, for example, as 8677295104 + 8045372416 = 93152^2 + 89696^2 .

It is not an unprimeable number, because it can be changed into a prime (16722667529) 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, 70310 + ... + 195930.

Almost surely, 2^16722667520 is an apocalyptic number.

16722667520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16722667520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21605727780).

16722667520 is an abundant number, since it is smaller than the sum of its proper divisors (26488788040).

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

16722667520 is a wasteful number, since it uses less digits than its factorization.

16722667520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125661 (or 125641 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 16722667520 in words is "sixteen billion, seven hundred twenty-two million, six hundred sixty-seven thousand, five hundred twenty".