77666673342 has 8 divisors (see below), whose sum is σ = 155333346696. Its totient is φ = 25888891112.

The previous prime is 77666673311. The next prime is 77666673373. The reversal of 77666673342 is 24337666677.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77666673311) and next prime (77666673373).

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

77666673342 is an admirable number.

It is a super-2 number, since 2×77666673342² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6472222773 + ... + 6472222784.

It is an arithmetic number, because the mean of its divisors is an integer number (19416668337).

Almost surely, 2^77666673342 is an apocalyptic number.

77666673342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77666673342 is a wasteful number, since it uses less digits than its factorization.

77666673342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12944445562.

The product of its digits is 32006016, while the sum is 57.

The spelling of 77666673342 in words is "seventy-seven billion, six hundred sixty-six million, six hundred seventy-three thousand, three hundred forty-two".