122782666 has 4 divisors (see below), whose sum is σ = 184174002. Its totient is φ = 61391332.

The previous prime is 122782657. The next prime is 122782727. The reversal of 122782666 is 666287221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666287221 = 53 ⋅12571457.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 41332041 = 9025^2 + 6429^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30695665 + ... + 30695668.

Almost surely, 2^122782666 is an apocalyptic number.

122782666 is a deficient number, since it is larger than the sum of its proper divisors (61391336).

122782666 is an equidigital number, since it uses as much as digits as its factorization.

122782666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61391335.

The product of its digits is 96768, while the sum is 40.

The square root of 122782666 is about 11080.7340009586. The cubic root of 122782666 is about 497.0258991911.

The spelling of 122782666 in words is "one hundred twenty-two million, seven hundred eighty-two thousand, six hundred sixty-six".