66219357 has 8 divisors (see below), whose sum is σ = 89536320. Its totient is φ = 43524320.

The previous prime is 66219347. The next prime is 66219367. The reversal of 66219357 is 75391266.

It is an interprime number because it is at equal distance from previous prime (66219347) and next prime (66219367).

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

It is a cyclic number.

It is not a de Polignac number, because 66219357 - 2²² = 62025053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66219347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155232 + ... + 155657.

It is an arithmetic number, because the mean of its divisors is an integer number (11192040).

Almost surely, 2^66219357 is an apocalyptic number.

It is an amenable number.

66219357 is a deficient number, since it is larger than the sum of its proper divisors (23316963).

66219357 is a wasteful number, since it uses less digits than its factorization.

66219357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310963.

The product of its digits is 68040, while the sum is 39.

The square root of 66219357 is about 8137.5276958054. The cubic root of 66219357 is about 404.5712212561.

The spelling of 66219357 in words is "sixty-six million, two hundred nineteen thousand, three hundred fifty-seven".