77550071 has 4 divisors (see below), whose sum is σ = 77573112. Its totient is φ = 77527032.

The previous prime is 77550059. The next prime is 77550091. The reversal of 77550071 is 17005577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17005577 = 31 ⋅548567.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77550071 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 (77550041) 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, 5381 + ... + 13566.

It is an arithmetic number, because the mean of its divisors is an integer number (19393278).

Almost surely, 2^77550071 is an apocalyptic number.

77550071 is a deficient number, since it is larger than the sum of its proper divisors (23041).

77550071 is a wasteful number, since it uses less digits than its factorization.

77550071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23040.

The product of its (nonzero) digits is 8575, while the sum is 32.

The square root of 77550071 is about 8806.2518133426. The cubic root of 77550071 is about 426.4427479709.

The spelling of 77550071 in words is "seventy-seven million, five hundred fifty thousand, seventy-one".