77742266 has 16 divisors (see below), whose sum is σ = 133760256. Its totient is φ = 33196176.

The previous prime is 77742257. The next prime is 77742289. The reversal of 77742266 is 66224777.

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, 6146 + ... + 13901.

It is an arithmetic number, because the mean of its divisors is an integer number (8360016).

Almost surely, 2^77742266 is an apocalyptic number.

77742266 is a deficient number, since it is larger than the sum of its proper divisors (56017990).

77742266 is a wasteful number, since it uses less digits than its factorization.

77742266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20333.

The product of its digits is 197568, while the sum is 41.

The square root of 77742266 is about 8817.1574784621. The cubic root of 77742266 is about 426.7947465688.

The spelling of 77742266 in words is "seventy-seven million, seven hundred forty-two thousand, two hundred sixty-six".