61066655 has 8 divisors (see below), whose sum is σ = 78916992. Its totient is φ = 45095328.

The previous prime is 61066637. The next prime is 61066657. The reversal of 61066655 is 55666016.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61066655 - 2⁶ = 61066591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61066657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469679 + ... + 469808.

It is an arithmetic number, because the mean of its divisors is an integer number (9864624).

Almost surely, 2^61066655 is an apocalyptic number.

61066655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61066655 is a deficient number, since it is larger than the sum of its proper divisors (17850337).

61066655 is a wasteful number, since it uses less digits than its factorization.

61066655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939505.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 61066655 is about 7814.5156599754. The cubic root of 61066655 is about 393.7930471119.

The spelling of 61066655 in words is "sixty-one million, sixty-six thousand, six hundred fifty-five".