77345061 has 4 divisors (see below), whose sum is σ = 103126752. Its totient is φ = 51563372.

The previous prime is 77345041. The next prime is 77345063. The reversal of 77345061 is 16054377.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16054377 = 3 ⋅5351459.

It is a cyclic number.

It is not a de Polignac number, because 77345061 - 2⁷ = 77344933 is a prime.

It is a super-2 number, since 2×77345061² = 11964516922187442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77345063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12890841 + ... + 12890846.

It is an arithmetic number, because the mean of its divisors is an integer number (25781688).

Almost surely, 2^77345061 is an apocalyptic number.

It is an amenable number.

77345061 is a deficient number, since it is larger than the sum of its proper divisors (25781691).

77345061 is a wasteful number, since it uses less digits than its factorization.

77345061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25781690.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 77345061 is about 8794.6040843235. The cubic root of 77345061 is about 426.0666375070.

The spelling of 77345061 in words is "seventy-seven million, three hundred forty-five thousand, sixty-one".