77646673 has 8 divisors (see below), whose sum is σ = 88020800. Its totient is φ = 67901328.

The previous prime is 77646637. The next prime is 77646697. The reversal of 77646673 is 37664677.

It is a happy number.

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 77646673 - 2¹⁷ = 77515601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77643673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156933 + ... + 157426.

It is an arithmetic number, because the mean of its divisors is an integer number (11002600).

Almost surely, 2^77646673 is an apocalyptic number.

It is an amenable number.

77646673 is a deficient number, since it is larger than the sum of its proper divisors (10374127).

77646673 is a wasteful number, since it uses less digits than its factorization.

77646673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314391.

The product of its digits is 889056, while the sum is 46.

The square root of 77646673 is about 8811.7349597000. The cubic root of 77646673 is about 426.6197438497.

The spelling of 77646673 in words is "seventy-seven million, six hundred forty-six thousand, six hundred seventy-three".