61213311066669 has 8 divisors (see below), whose sum is σ = 81632898982560. Its totient is φ = 40801298597616.

The previous prime is 61213311066667. The next prime is 61213311066709. The reversal of 61213311066669 is 96666011331216.

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

It is not a de Polignac number, because 61213311066669 - 2¹ = 61213311066667 is a prime.

It is a super-2 number, since 2×61213311066669² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61213311066667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1893842854 + ... + 1893875175.

It is an arithmetic number, because the mean of its divisors is an integer number (10204112372820).

Almost surely, 2^{61213311066669} is an apocalyptic number.

It is an amenable number.

61213311066669 is a deficient number, since it is larger than the sum of its proper divisors (20419587915891).

61213311066669 is a wasteful number, since it uses less digits than its factorization.

61213311066669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787723419.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 61213311066669 in words is "sixty-one trillion, two hundred thirteen billion, three hundred eleven million, sixty-six thousand, six hundred sixty-nine".