77992663 has 12 divisors (see below), whose sum is σ = 95502360. Its totient is φ = 63331632.

The previous prime is 77992657. The next prime is 77992667. The reversal of 77992663 is 36629977.

It is not a de Polignac number, because 77992663 - 2¹³ = 77984471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77992667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40956 + ... + 42817.

It is an arithmetic number, because the mean of its divisors is an integer number (7958530).

Almost surely, 2^77992663 is an apocalyptic number.

77992663 is a deficient number, since it is larger than the sum of its proper divisors (17509697).

77992663 is a wasteful number, since it uses less digits than its factorization.

77992663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83806 (or 83799 counting only the distinct ones).

The product of its digits is 857304, while the sum is 49.

The square root of 77992663 is about 8831.3454807294. The cubic root of 77992663 is about 427.2524709562.

The spelling of 77992663 in words is "seventy-seven million, nine hundred ninety-two thousand, six hundred sixty-three".