16681677500 has 30 divisors (see below), whose sum is σ = 36479497824. Its totient is φ = 6672670000.

The previous prime is 16681677497. The next prime is 16681677541. The reversal of 16681677500 is 577618661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3333836 + ... + 3338835.

Almost surely, 2^16681677500 is an apocalyptic number.

16681677500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16681677500 is an abundant number, since it is smaller than the sum of its proper divisors (19797820324).

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

16681677500 is an equidigital number, since it uses as much as digits as its factorization.

16681677500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672695 (or 6672678 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 16681677500 in words is "sixteen billion, six hundred eighty-one million, six hundred seventy-seven thousand, five hundred".