16677777520 has 40 divisors (see below), whose sum is σ = 38949757056. Its totient is φ = 6641188608.

The previous prime is 16677777509. The next prime is 16677777521. The reversal of 16677777520 is 2577777661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16677777521) 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, 449587 + ... + 485266.

Almost surely, 2^16677777520 is an apocalyptic number.

16677777520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16677777520 is an abundant number, since it is smaller than the sum of its proper divisors (22271979536).

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

16677777520 is a wasteful number, since it uses less digits than its factorization.

16677777520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935089 (or 935083 counting only the distinct ones).

The product of its (nonzero) digits is 6050520, while the sum is 55.

The spelling of 16677777520 in words is "sixteen billion, six hundred seventy-seven million, seven hundred seventy-seven thousand, five hundred twenty".