42066520516601 has 4 divisors (see below), whose sum is σ = 48076023447552. Its totient is φ = 36057017585652.

The previous prime is 42066520516513. The next prime is 42066520516633. The reversal of 42066520516601 is 10661502566024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42066520516601 - 2¹⁴ = 42066520500217 is a prime.

It is a super-2 number, since 2×42066520516601² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42066520516661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3004751465465 + ... + 3004751465478.

It is an arithmetic number, because the mean of its divisors is an integer number (12019005861888).

Almost surely, 2^{42066520516601} is an apocalyptic number.

It is an amenable number.

42066520516601 is a deficient number, since it is larger than the sum of its proper divisors (6009502930951).

42066520516601 is an equidigital number, since it uses as much as digits as its factorization.

42066520516601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6009502930950.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 42066520516601 in words is "forty-two trillion, sixty-six billion, five hundred twenty million, five hundred sixteen thousand, six hundred one".