16685003380 has 12 divisors (see below), whose sum is σ = 35038507140. Its totient is φ = 6674001344.

The previous prime is 16685003351. The next prime is 16685003393. The reversal of 16685003380 is 8330058661.

It can be written as a sum of positive squares in 2 ways, for example, as 4435826404 + 12249176976 = 66602^2 + 110676^2 .

It is a super-2 number, since 2×16685003380² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417125065 + ... + 417125104.

It is an arithmetic number, because the mean of its divisors is an integer number (2919875595).

Almost surely, 2^16685003380 is an apocalyptic number.

16685003380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16685003380 is an abundant number, since it is smaller than the sum of its proper divisors (18353503760).

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

16685003380 is a wasteful number, since it uses less digits than its factorization.

16685003380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834250178 (or 834250176 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 16685003380 in words is "sixteen billion, six hundred eighty-five million, three thousand, three hundred eighty".