61166545 has 16 divisors (see below), whose sum is σ = 83555712. Its totient is φ = 42549760.

The previous prime is 61166543. The next prime is 61166557. The reversal of 61166545 is 54566116.

It is a happy number.

It is not a de Polignac number, because 61166545 - 2¹ = 61166543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61166545.

It is not an unprimeable number, because it can be changed into a prime (61166543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22912 + ... + 25441.

It is an arithmetic number, because the mean of its divisors is an integer number (5222232).

Almost surely, 2^61166545 is an apocalyptic number.

It is an amenable number.

61166545 is a deficient number, since it is larger than the sum of its proper divisors (22389167).

61166545 is a wasteful number, since it uses less digits than its factorization.

61166545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48392.

The product of its digits is 21600, while the sum is 34.

The square root of 61166545 is about 7820.9043594715. The cubic root of 61166545 is about 394.0076462738.

The spelling of 61166545 in words is "sixty-one million, one hundred sixty-six thousand, five hundred forty-five".