61540166 has 4 divisors (see below), whose sum is σ = 92310252. Its totient is φ = 30770082.

The previous prime is 61540163. The next prime is 61540169. The reversal of 61540166 is 66104516.

61540166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61540163) and next prime (61540169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61540163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15385040 + ... + 15385043.

It is an arithmetic number, because the mean of its divisors is an integer number (23077563).

Almost surely, 2^61540166 is an apocalyptic number.

61540166 is a deficient number, since it is larger than the sum of its proper divisors (30770086).

61540166 is a wasteful number, since it uses less digits than its factorization.

61540166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30770085.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 61540166 is about 7844.7540433082. The cubic root of 61540166 is about 394.8082517496.

The spelling of 61540166 in words is "sixty-one million, five hundred forty thousand, one hundred sixty-six".