66436572 has 12 divisors (see below), whose sum is σ = 155018696. Its totient is φ = 22145520.

The previous prime is 66436553. The next prime is 66436589. The reversal of 66436572 is 27563466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×66436572² = 8827636198222368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66436572.

It is a congruent number.

It is an unprimeable number.

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, 2768179 + ... + 2768202.

Almost surely, 2^66436572 is an apocalyptic number.

It is an amenable number.

66436572 is an abundant number, since it is smaller than the sum of its proper divisors (88582124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66436572 is a wasteful number, since it uses less digits than its factorization.

66436572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536388 (or 5536386 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The square root of 66436572 is about 8150.8632671638. The cubic root of 66436572 is about 405.0131012375.

The spelling of 66436572 in words is "sixty-six million, four hundred thirty-six thousand, five hundred seventy-two".