77000066 has 16 divisors (see below), whose sum is σ = 135692928. Its totient is φ = 32307600.

The previous prime is 77000047. The next prime is 77000069. The reversal of 77000066 is 66000077.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 76999999 and 77000044.

It is not an unprimeable number, because it can be changed into a prime (77000069) 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 7 ways as a sum of consecutive naturals, for example, 134330 + ... + 134901.

It is an arithmetic number, because the mean of its divisors is an integer number (8480808).

Almost surely, 2^77000066 is an apocalyptic number.

77000066 is a deficient number, since it is larger than the sum of its proper divisors (58692862).

77000066 is a wasteful number, since it uses less digits than its factorization.

77000066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269257.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 77000066 is about 8774.9681480903. The cubic root of 77000066 is about 425.4322080635.

The spelling of 77000066 in words is "seventy-seven million, sixty-six", and thus it is an aban number and an uban number.