77764946 has 16 divisors (see below), whose sum is σ = 136563840. Its totient is φ = 32514720.

The previous prime is 77764943. The next prime is 77764961. The reversal of 77764946 is 64946777.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77764894 and 77764903.

It is not an unprimeable number, because it can be changed into a prime (77764943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67166 + ... + 68313.

It is an arithmetic number, because the mean of its divisors is an integer number (8535240).

Almost surely, 2^77764946 is an apocalyptic number.

77764946 is a deficient number, since it is larger than the sum of its proper divisors (58798894).

77764946 is a wasteful number, since it uses less digits than its factorization.

77764946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135529.

The product of its digits is 1778112, while the sum is 50.

The square root of 77764946 is about 8818.4435134552. The cubic root of 77764946 is about 426.8362459325.

The spelling of 77764946 in words is "seventy-seven million, seven hundred sixty-four thousand, nine hundred forty-six".