66166526 has 4 divisors (see below), whose sum is σ = 99249792. Its totient is φ = 33083262.

The previous prime is 66166523. The next prime is 66166537. The reversal of 66166526 is 62566166.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66166526.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66166523) 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 as a sum of consecutive naturals, namely, 16541630 + ... + 16541633.

It is an arithmetic number, because the mean of its divisors is an integer number (24812448).

Almost surely, 2^66166526 is an apocalyptic number.

66166526 is a deficient number, since it is larger than the sum of its proper divisors (33083266).

66166526 is a wasteful number, since it uses less digits than its factorization.

66166526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33083265.

The product of its digits is 77760, while the sum is 38.

The square root of 66166526 is about 8134.2809147459. The cubic root of 66166526 is about 404.4636012195.

The spelling of 66166526 in words is "sixty-six million, one hundred sixty-six thousand, five hundred twenty-six".