16680501 has 12 divisors (see below), whose sum is σ = 24152128. Its totient is φ = 11093544.

The previous prime is 16680467. The next prime is 16680509. The reversal of 16680501 is 10508661.

It is not a de Polignac number, because 16680501 - 2⁷ = 16680373 is a prime.

It is a super-2 number, since 2×16680501² = 556478227222002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2166 + ... + 6168.

Almost surely, 2^16680501 is an apocalyptic number.

It is an amenable number.

16680501 is a deficient number, since it is larger than the sum of its proper divisors (7471627).

16680501 is a wasteful number, since it uses less digits than its factorization.

16680501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472 (or 4469 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 16680501 is about 4084.1769060608. The cubic root of 16680501 is about 255.5071337860.

It can be divided in two parts, 1668050 and 1, that added together give a triangular number (1668051 = T₁₈₂₆).

The spelling of 16680501 in words is "sixteen million, six hundred eighty thousand, five hundred one".