16666137 has 12 divisors (see below), whose sum is σ = 25489620. Its totient is φ = 10457088.

The previous prime is 16666093. The next prime is 16666141. The reversal of 16666137 is 73166661.

It can be written as a sum of positive squares in 2 ways, for example, as 9585216 + 7080921 = 3096^2 + 2661^2 .

It is not a de Polignac number, because 16666137 - 2⁸ = 16665881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16666147) 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, 54312 + ... + 54617.

It is an arithmetic number, because the mean of its divisors is an integer number (2124135).

Almost surely, 2^16666137 is an apocalyptic number.

16666137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16666137 is a deficient number, since it is larger than the sum of its proper divisors (8823483).

16666137 is a wasteful number, since it uses less digits than its factorization.

16666137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108952 (or 108949 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 16666137 is about 4082.4180334699. The cubic root of 16666137 is about 255.4337715121.

The spelling of 16666137 in words is "sixteen million, six hundred sixty-six thousand, one hundred thirty-seven".