66146213 has 8 divisors (see below), whose sum is σ = 76344960. Its totient is φ = 56134800.

The previous prime is 66146209. The next prime is 66146287. The reversal of 66146213 is 31264166.

It is a happy number.

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 66146213 - 2² = 66146209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66148213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46073 + ... + 47486.

It is an arithmetic number, because the mean of its divisors is an integer number (9543120).

Almost surely, 2^66146213 is an apocalyptic number.

It is an amenable number.

66146213 is a deficient number, since it is larger than the sum of its proper divisors (10198747).

66146213 is a wasteful number, since it uses less digits than its factorization.

66146213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93667.

The product of its digits is 5184, while the sum is 29.

The square root of 66146213 is about 8133.0322143712. The cubic root of 66146213 is about 404.4222071263.

The spelling of 66146213 in words is "sixty-six million, one hundred forty-six thousand, two hundred thirteen".