77342666 has 4 divisors (see below), whose sum is σ = 116014002. Its totient is φ = 38671332.

The previous prime is 77342663. The next prime is 77342677. The reversal of 77342666 is 66624377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66624377 = 17 ⋅3919081.

It can be written as a sum of positive squares in only one way, i.e., 76300225 + 1042441 = 8735^2 + 1021^2 .

It is not an unprimeable number, because it can be changed into a prime (77342663) by changing a digit.

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, 19335665 + ... + 19335668.

Almost surely, 2^77342666 is an apocalyptic number.

77342666 is a deficient number, since it is larger than the sum of its proper divisors (38671336).

77342666 is a wasteful number, since it uses less digits than its factorization.

77342666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38671335.

The product of its digits is 254016, while the sum is 41.

The square root of 77342666 is about 8794.4679202326. The cubic root of 77342666 is about 426.0622397251.

The spelling of 77342666 in words is "seventy-seven million, three hundred forty-two thousand, six hundred sixty-six".