66455212 has 6 divisors (see below), whose sum is σ = 116296628. Its totient is φ = 33227604.

The previous prime is 66455197. The next prime is 66455231. The reversal of 66455212 is 21255466.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8306898 + ... + 8306905.

Almost surely, 2^66455212 is an apocalyptic number.

It is an amenable number.

66455212 is a deficient number, since it is larger than the sum of its proper divisors (49841416).

66455212 is a wasteful number, since it uses less digits than its factorization.

66455212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16613807 (or 16613805 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 66455212 is about 8152.0066241386. The cubic root of 66455212 is about 405.0509756494.

The spelling of 66455212 in words is "sixty-six million, four hundred fifty-five thousand, two hundred twelve".