77761406 has 16 divisors (see below), whose sum is σ = 120911616. Its totient is φ = 37482456.

The previous prime is 77761403. The next prime is 77761427. The reversal of 77761406 is 60416777.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77761406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77761403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125 + ... + 12471.

It is an arithmetic number, because the mean of its divisors is an integer number (7556976).

Almost surely, 2^77761406 is an apocalyptic number.

77761406 is a deficient number, since it is larger than the sum of its proper divisors (43150210).

77761406 is a wasteful number, since it uses less digits than its factorization.

77761406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12463.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 77761406 is about 8818.2427954780. The cubic root of 77761406 is about 426.8297690500.

The spelling of 77761406 in words is "seventy-seven million, seven hundred sixty-one thousand, four hundred six".