66770231 has 8 divisors (see below), whose sum is σ = 73486224. Its totient is φ = 60161920.

The previous prime is 66770213. The next prime is 66770233. The reversal of 66770231 is 13207766.

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 66770231 - 2²² = 62575927 is a prime.

It is a super-2 number, since 2×66770231² = 8916527495586722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770233) 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, 25616 + ... + 28101.

It is an arithmetic number, because the mean of its divisors is an integer number (9185778).

Almost surely, 2^66770231 is an apocalyptic number.

66770231 is a deficient number, since it is larger than the sum of its proper divisors (6715993).

66770231 is a wasteful number, since it uses less digits than its factorization.

66770231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53841.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 66770231 is about 8171.3053424774. The cubic root of 66770231 is about 405.6899908051.

Adding to 66770231 its reverse (13207766), we get a palindrome (79977997).

The spelling of 66770231 in words is "sixty-six million, seven hundred seventy thousand, two hundred thirty-one".