66543662 has 8 divisors (see below), whose sum is σ = 105069000. Its totient is φ = 31520664.

The previous prime is 66543647. The next prime is 66543667. The reversal of 66543662 is 26634566.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 1751149 = 66543662 / (6 + 6 + 5 + 4 + 3 + 6 + 6 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66543667) 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, 875537 + ... + 875612.

It is an arithmetic number, because the mean of its divisors is an integer number (13133625).

Almost surely, 2^66543662 is an apocalyptic number.

66543662 is a deficient number, since it is larger than the sum of its proper divisors (38525338).

66543662 is a wasteful number, since it uses less digits than its factorization.

66543662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751170.

The product of its digits is 155520, while the sum is 38.

The square root of 66543662 is about 8157.4298648533. The cubic root of 66543662 is about 405.2305997634.

The spelling of 66543662 in words is "sixty-six million, five hundred forty-three thousand, six hundred sixty-two".