66212195 has 32 divisors (see below), whose sum is σ = 96743808. Its totient is φ = 42467328.

The previous prime is 66212189. The next prime is 66212213. The reversal of 66212195 is 59121266.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66212195 - 2¹⁶ = 66146659 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152699 + ... + 153131.

It is an arithmetic number, because the mean of its divisors is an integer number (3023244).

Almost surely, 2^66212195 is an apocalyptic number.

66212195 is a deficient number, since it is larger than the sum of its proper divisors (30531613).

66212195 is a wasteful number, since it uses less digits than its factorization.

66212195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719.

The product of its digits is 6480, while the sum is 32.

The square root of 66212195 is about 8137.0876239598. The cubic root of 66212195 is about 404.5566351709.

The spelling of 66212195 in words is "sixty-six million, two hundred twelve thousand, one hundred ninety-five".