61667255 has 48 divisors (see below), whose sum is σ = 88542720. Its totient is φ = 41019264.

The previous prime is 61667251. The next prime is 61667273. The reversal of 61667255 is 55276616.

It is not a de Polignac number, because 61667255 - 2² = 61667251 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (75600) is a multiple of the sum of its prime factors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61667251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 369182 + ... + 369348.

It is an arithmetic number, because the mean of its divisors is an integer number (1844640).

Almost surely, 2^61667255 is an apocalyptic number.

61667255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61667255 is a deficient number, since it is larger than the sum of its proper divisors (26875465).

61667255 is a wasteful number, since it uses less digits than its factorization.

61667255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 227 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The square root of 61667255 is about 7852.8501195426. The cubic root of 61667255 is about 395.0798428569.

The spelling of 61667255 in words is "sixty-one million, six hundred sixty-seven thousand, two hundred fifty-five".