66105157519 has 8 divisors (see below), whose sum is σ = 68275064592. Its totient is φ = 63969422400.

The previous prime is 66105157499. The next prime is 66105157529. The reversal of 66105157519 is 91575150166.

It is a happy number.

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 66105157519 - 2⁵ = 66105157487 is a prime.

It is a super-2 number, since 2×66105157519² (a number of 22 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 (66105157529) 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, 8539057 + ... + 8546794.

It is an arithmetic number, because the mean of its divisors is an integer number (8534383074).

Almost surely, 2^66105157519 is an apocalyptic number.

66105157519 is a deficient number, since it is larger than the sum of its proper divisors (2169907073).

66105157519 is a wasteful number, since it uses less digits than its factorization.

66105157519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17085977.

The product of its (nonzero) digits is 283500, while the sum is 46.

The spelling of 66105157519 in words is "sixty-six billion, one hundred five million, one hundred fifty-seven thousand, five hundred nineteen".