77661411 has 4 divisors (see below), whose sum is σ = 103548552. Its totient is φ = 51774272.

The previous prime is 77661407. The next prime is 77661431. The reversal of 77661411 is 11416677.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77661411 - 2² = 77661407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77661431) 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, 12943566 + ... + 12943571.

It is an arithmetic number, because the mean of its divisors is an integer number (25887138).

Almost surely, 2^77661411 is an apocalyptic number.

77661411 is a deficient number, since it is larger than the sum of its proper divisors (25887141).

77661411 is a wasteful number, since it uses less digits than its factorization.

77661411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25887140.

The product of its digits is 7056, while the sum is 33.

The square root of 77661411 is about 8812.5711912018. The cubic root of 77661411 is about 426.6467341627.

The spelling of 77661411 in words is "seventy-seven million, six hundred sixty-one thousand, four hundred eleven".