66162225 has 24 divisors (see below), whose sum is σ = 109680480. Its totient is φ = 35192320.

The previous prime is 66162221. The next prime is 66162241. The reversal of 66162225 is 52226166.

It is not a de Polignac number, because 66162225 - 2² = 66162221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66162192 and 66162201.

It is not an unprimeable number, because it can be changed into a prime (66162221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34081 + ... + 35969.

It is an arithmetic number, because the mean of its divisors is an integer number (4570020).

Almost surely, 2^66162225 is an apocalyptic number.

It is an amenable number.

66162225 is a deficient number, since it is larger than the sum of its proper divisors (43518255).

66162225 is a wasteful number, since it uses less digits than its factorization.

66162225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369 (or 2364 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 66162225 is about 8134.0165355131. The cubic root of 66162225 is about 404.4548372934.

The spelling of 66162225 in words is "sixty-six million, one hundred sixty-two thousand, two hundred twenty-five".