66219148 has 18 divisors (see below), whose sum is σ = 123103316. Its totient is φ = 31161408.

The previous prime is 66219133. The next prime is 66219149. The reversal of 66219148 is 84191266.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66219149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27486 + ... + 29797.

Almost surely, 2^66219148 is an apocalyptic number.

66219148 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66219148 is a deficient number, since it is larger than the sum of its proper divisors (56884168).

66219148 is a wasteful number, since it uses less digits than its factorization.

66219148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57321 (or 57302 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 66219148 is about 8137.5148540571. The cubic root of 66219148 is about 404.5707956229.

The spelling of 66219148 in words is "sixty-six million, two hundred nineteen thousand, one hundred forty-eight".