66105630621031 has 8 divisors (see below), whose sum is σ = 66258893600640. Its totient is φ = 65952417681528.

The previous prime is 66105630621013. The next prime is 66105630621071. The reversal of 66105630621031 is 13012603650166.

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 66105630621031 - 2³¹ = 66103483137383 is a prime.

It is a super-2 number, since 2×66105630621031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66105630621071) 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, 9864211 + ... + 15149716.

It is an arithmetic number, because the mean of its divisors is an integer number (8282361700080).

Almost surely, 2^{66105630621031} is an apocalyptic number.

66105630621031 is a deficient number, since it is larger than the sum of its proper divisors (153262979609).

66105630621031 is a wasteful number, since it uses less digits than its factorization.

66105630621031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25020053.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 66105630621031 in words is "sixty-six trillion, one hundred five billion, six hundred thirty million, six hundred twenty-one thousand, thirty-one".