61617266 has 16 divisors (see below), whose sum is σ = 97796160. Its totient is φ = 29035440.

The previous prime is 61617263. The next prime is 61617277. The reversal of 61617266 is 66271616.

61617266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61617263) 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 in 7 ways as a sum of consecutive naturals, for example, 3371 + ... + 11601.

It is an arithmetic number, because the mean of its divisors is an integer number (6112260).

Almost surely, 2^61617266 is an apocalyptic number.

61617266 is a deficient number, since it is larger than the sum of its proper divisors (36178894).

61617266 is a wasteful number, since it uses less digits than its factorization.

61617266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8449.

The product of its digits is 18144, while the sum is 35.

The square root of 61617266 is about 7849.6666171246. Note that the first 4 decimals coincide. The cubic root of 61617266 is about 394.9730601720.

The spelling of 61617266 in words is "sixty-one million, six hundred seventeen thousand, two hundred sixty-six".