77665141 has 4 divisors (see below), whose sum is σ = 81752800. Its totient is φ = 73577484.

The previous prime is 77665079. The next prime is 77665151. The reversal of 77665141 is 14156677.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77665141 - 2¹¹ = 77663093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77665141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77665151) 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, 2043801 + ... + 2043838.

It is an arithmetic number, because the mean of its divisors is an integer number (20438200).

Almost surely, 2^77665141 is an apocalyptic number.

It is an amenable number.

77665141 is a deficient number, since it is larger than the sum of its proper divisors (4087659).

77665141 is a wasteful number, since it uses less digits than its factorization.

77665141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087658.

The product of its digits is 35280, while the sum is 37.

The square root of 77665141 is about 8812.7828181568. The cubic root of 77665141 is about 426.6535645255.

The spelling of 77665141 in words is "seventy-seven million, six hundred sixty-five thousand, one hundred forty-one".