66150540523 has 8 divisors (see below), whose sum is σ = 67623575040. Its totient is φ = 64680238440.

The previous prime is 66150540503. The next prime is 66150540529. The reversal of 66150540523 is 32504505166.

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 66150540523 - 2³³ = 57560605931 is a prime.

It is a super-2 number, since 2×66150540523² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66150540529) 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, 634113 + ... + 731026.

It is an arithmetic number, because the mean of its divisors is an integer number (8452946880).

Almost surely, 2^66150540523 is an apocalyptic number.

66150540523 is a deficient number, since it is larger than the sum of its proper divisors (1473034517).

66150540523 is a wasteful number, since it uses less digits than its factorization.

66150540523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366217.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 66150540523 in words is "sixty-six billion, one hundred fifty million, five hundred forty thousand, five hundred twenty-three".