61255404021066 has 16 divisors (see below), whose sum is σ = 122517760010304. Its totient is φ = 20417309345664.

The previous prime is 61255404021061. The next prime is 61255404021067. The reversal of 61255404021066 is 66012040455216.

61255404021066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61255404021061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289550791 + ... + 289762266.

It is an arithmetic number, because the mean of its divisors is an integer number (7657360000644).

Almost surely, 2^{61255404021066} is an apocalyptic number.

61255404021066 is an abundant number, since it is smaller than the sum of its proper divisors (61262355989238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61255404021066 is a wasteful number, since it uses less digits than its factorization.

61255404021066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579330685.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 61255404021066 in words is "sixty-one trillion, two hundred fifty-five billion, four hundred four million, twenty-one thousand, sixty-six".