66543722 has 8 divisors (see below), whose sum is σ = 114074976. Its totient is φ = 28518732.

The previous prime is 66543721. The next prime is 66543727. The reversal of 66543722 is 22734566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66543722² = 8856133875226568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66543721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2376548 + ... + 2376575.

It is an arithmetic number, because the mean of its divisors is an integer number (14259372).

Almost surely, 2^66543722 is an apocalyptic number.

66543722 is a deficient number, since it is larger than the sum of its proper divisors (47531254).

66543722 is a wasteful number, since it uses less digits than its factorization.

66543722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753132.

The product of its digits is 60480, while the sum is 35.

The square root of 66543722 is about 8157.4335424814. The cubic root of 66543722 is about 405.2307215573.

The spelling of 66543722 in words is "sixty-six million, five hundred forty-three thousand, seven hundred twenty-two".