61220413066 has 8 divisors (see below), whose sum is σ = 91834547364. Its totient is φ = 30608897280.

The previous prime is 61220413061. The next prime is 61220413117. The reversal of 61220413066 is 66031402216.

It can be written as a sum of positive squares in 2 ways, for example, as 57147293025 + 4073120041 = 239055^2 + 63821^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61220413061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595095 + ... + 690346.

Almost surely, 2^61220413066 is an apocalyptic number.

61220413066 is a deficient number, since it is larger than the sum of its proper divisors (30614134298).

61220413066 is a wasteful number, since it uses less digits than its factorization.

61220413066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309256.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 61220413066 in words is "sixty-one billion, two hundred twenty million, four hundred thirteen thousand, sixty-six".