77000061 has 4 divisors (see below), whose sum is σ = 102666752. Its totient is φ = 51333372.

The previous prime is 77000047. The next prime is 77000069. The reversal of 77000061 is 16000077.

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 not a de Polignac number, because 77000061 - 2⁵ = 77000029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77000069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12833341 + ... + 12833346.

It is an arithmetic number, because the mean of its divisors is an integer number (25666688).

Almost surely, 2^77000061 is an apocalyptic number.

It is an amenable number.

77000061 is a deficient number, since it is larger than the sum of its proper divisors (25666691).

77000061 is a wasteful number, since it uses less digits than its factorization.

77000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25666690.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 77000061 is about 8774.9678631890. The cubic root of 77000061 is about 425.4321988550.

The spelling of 77000061 in words is "seventy-seven million, sixty-one", and thus it is an aban number and an uban number.