77142065 has 32 divisors (see below), whose sum is σ = 124298496. Its totient is φ = 44386560.

The previous prime is 77142061. The next prime is 77142067. The reversal of 77142065 is 56024177.

It is not a de Polignac number, because 77142065 - 2² = 77142061 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (77142061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2702 + ... + 12711.

It is an arithmetic number, because the mean of its divisors is an integer number (3884328).

Almost surely, 2^77142065 is an apocalyptic number.

It is an amenable number.

77142065 is a deficient number, since it is larger than the sum of its proper divisors (47156431).

77142065 is a wasteful number, since it uses less digits than its factorization.

77142065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15449.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 77142065 is about 8783.0555617052. The cubic root of 77142065 is about 425.6935665004.

It can be divided in two parts, 7714 and 2065, that added together give a palindrome (9779).

The spelling of 77142065 in words is "seventy-seven million, one hundred forty-two thousand, sixty-five".