66617230 has 16 divisors (see below), whose sum is σ = 126222480. Its totient is φ = 25244352.

The previous prime is 66617197. The next prime is 66617261. The reversal of 66617230 is 3271666.

It is a junction number, because it is equal to n+sod(n) for n = 66617192 and 66617201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175119 + ... + 175498.

It is an arithmetic number, because the mean of its divisors is an integer number (7888905).

Almost surely, 2^66617230 is an apocalyptic number.

66617230 is a deficient number, since it is larger than the sum of its proper divisors (59605250).

66617230 is a wasteful number, since it uses less digits than its factorization.

66617230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350643.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 66617230 is about 8161.9378826355. The cubic root of 66617230 is about 405.3798803225.

Adding to 66617230 its reverse (3271666), we get a palindrome (69888896).

The spelling of 66617230 in words is "sixty-six million, six hundred seventeen thousand, two hundred thirty".