77680742 has 8 divisors (see below), whose sum is σ = 117293232. Its totient is φ = 38583000.

The previous prime is 77680741. The next prime is 77680753. The reversal of 77680742 is 24708677.

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

It is a self number, because there is not a number n which added to its sum of digits gives 77680742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77680741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128309 + ... + 128912.

It is an arithmetic number, because the mean of its divisors is an integer number (14661654).

Almost surely, 2^77680742 is an apocalyptic number.

77680742 is a deficient number, since it is larger than the sum of its proper divisors (39612490).

77680742 is a wasteful number, since it uses less digits than its factorization.

77680742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257374.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 77680742 is about 8813.6679084250. The cubic root of 77680742 is about 426.6821306515.

It can be divided in two parts, 776 and 80742, that added together give a palindrome (81518).

The spelling of 77680742 in words is "seventy-seven million, six hundred eighty thousand, seven hundred forty-two".