7166538 has 24 divisors (see below), whose sum is σ = 16064100. Its totient is φ = 2306304.

The previous prime is 7166531. The next prime is 7166543. The reversal of 7166538 is 8356617.

It can be written as a sum of positive squares in 2 ways, for example, as 7144929 + 21609 = 2673^2 + 147^2 .

It is not an unprimeable number, because it can be changed into a prime (7166531) 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, 6343 + ... + 7386.

Almost surely, 2^7166538 is an apocalyptic number.

7166538 is an abundant number, since it is smaller than the sum of its proper divisors (8897562).

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

7166538 is a wasteful number, since it uses less digits than its factorization.

7166538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13766 (or 13763 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 7166538 is about 2677.0390359500. The cubic root of 7166538 is about 192.7982715076.

The spelling of 7166538 in words is "seven million, one hundred sixty-six thousand, five hundred thirty-eight".