66770101 has 8 divisors (see below), whose sum is σ = 71216280. Its totient is φ = 62381568.

The previous prime is 66770083. The next prime is 66770117. The reversal of 66770101 is 10107766.

It can be written as a sum of positive squares in 4 ways, for example, as 31069476 + 35700625 = 5574^2 + 5975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66770101 - 2⁵ = 66770069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66770101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12006 + ... + 16663.

It is an arithmetic number, because the mean of its divisors is an integer number (8902035).

Almost surely, 2^66770101 is an apocalyptic number.

It is an amenable number.

66770101 is a deficient number, since it is larger than the sum of its proper divisors (4446179).

66770101 is a wasteful number, since it uses less digits than its factorization.

66770101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28823.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 66770101 is about 8171.2973878081. The cubic root of 66770101 is about 405.6897275154.

Adding to 66770101 its reverse (10107766), we get a palindrome (76877867).

The spelling of 66770101 in words is "sixty-six million, seven hundred seventy thousand, one hundred one".