16137666 has 12 divisors (see below), whose sum is σ = 34964982. Its totient is φ = 5379216.

The previous prime is 16137637. The next prime is 16137673. The reversal of 16137666 is 66673161.

It can be written as a sum of positive squares in only one way, i.e., 13950225 + 2187441 = 3735^2 + 1479^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16137666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 448251 + ... + 448286.

Almost surely, 2^16137666 is an apocalyptic number.

16137666 is an abundant number, since it is smaller than the sum of its proper divisors (18827316).

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

16137666 is a wasteful number, since it uses less digits than its factorization.

16137666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896545 (or 896542 counting only the distinct ones).

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

The square root of 16137666 is about 4017.1713929082. The cubic root of 16137666 is about 252.7048483067.

The spelling of 16137666 in words is "sixteen million, one hundred thirty-seven thousand, six hundred sixty-six".