77760061 has 2 divisors, whose sum is σ = 77760062. Its totient is φ = 77760060.

The previous prime is 77760031. The next prime is 77760077. The reversal of 77760061 is 16006777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49084036 + 28676025 = 7006^2 + 5355^2 .

It is a cyclic number.

It is not a de Polignac number, because 77760061 - 2⁵ = 77760029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77759999 and 77760026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77760031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38880030 + 38880031.

It is an arithmetic number, because the mean of its divisors is an integer number (38880031).

Almost surely, 2^77760061 is an apocalyptic number.

It is an amenable number.

77760061 is a deficient number, since it is larger than the sum of its proper divisors (1).

77760061 is an equidigital number, since it uses as much as digits as its factorization.

77760061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 77760061 is about 8818.1665327890. The cubic root of 77760061 is about 426.8273081491.

The spelling of 77760061 in words is "seventy-seven million, seven hundred sixty thousand, sixty-one".