77108642 has 8 divisors (see below), whose sum is σ = 124560156. Its totient is φ = 35588592.

The previous prime is 77108639. The next prime is 77108663. The reversal of 77108642 is 24680177.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 54745201 + 22363441 = 7399^2 + 4729^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1482833 + ... + 1482884.

Almost surely, 2^77108642 is an apocalyptic number.

77108642 is a deficient number, since it is larger than the sum of its proper divisors (47451514).

77108642 is a wasteful number, since it uses less digits than its factorization.

77108642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965732.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 77108642 is about 8781.1526578235. The cubic root of 77108642 is about 425.6320781654.

The spelling of 77108642 in words is "seventy-seven million, one hundred eight thousand, six hundred forty-two".