66062460642439 has 4 divisors (see below), whose sum is σ = 66062478628656. Its totient is φ = 66062442656224.

The previous prime is 66062460642413. The next prime is 66062460642461. The reversal of 66062460642439 is 93424606426066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66062460642439 - 2¹¹ = 66062460640391 is a prime.

It is a super-2 number, since 2×66062460642439² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66062460642539) 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, 1276699 + ... + 11565244.

It is an arithmetic number, because the mean of its divisors is an integer number (16515619657164).

Almost surely, 2^{66062460642439} is an apocalyptic number.

66062460642439 is a deficient number, since it is larger than the sum of its proper divisors (17986217).

66062460642439 is a wasteful number, since it uses less digits than its factorization.

66062460642439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17986216.

The product of its (nonzero) digits is 53747712, while the sum is 58.

The spelling of 66062460642439 in words is "sixty-six trillion, sixty-two billion, four hundred sixty million, six hundred forty-two thousand, four hundred thirty-nine".