77773077 has 6 divisors (see below), whose sum is σ = 112338902. Its totient is φ = 51848712.

The previous prime is 77773049. The next prime is 77773081. The reversal of 77773077 is 77037777.

It can be written as a sum of positive squares in only one way, i.e., 75585636 + 2187441 = 8694^2 + 1479^2 .

It is not a de Polignac number, because 77773077 - 2¹⁰ = 77772053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77773027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4320718 + ... + 4320735.

Almost surely, 2^77773077 is an apocalyptic number.

It is an amenable number.

77773077 is a deficient number, since it is larger than the sum of its proper divisors (34565825).

77773077 is a wasteful number, since it uses less digits than its factorization.

77773077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8641459 (or 8641456 counting only the distinct ones).

The product of its (nonzero) digits is 352947, while the sum is 45.

The square root of 77773077 is about 8818.9045238057. The cubic root of 77773077 is about 426.8511218920.

The spelling of 77773077 in words is "seventy-seven million, seven hundred seventy-three thousand, seventy-seven".