77266404 has 18 divisors (see below), whose sum is σ = 195312390. Its totient is φ = 25755456.

The previous prime is 77266393. The next prime is 77266429. The reversal of 77266404 is 40466277.

77266404 is a `hidden beast` number, since 7 + 7 + 2 + 6 + 640 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77264100 + 2304 = 8790^2 + 48^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2146289 = 77266404 / (7 + 7 + 2 + 6 + 6 + 4 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1073109 + ... + 1073180.

Almost surely, 2^77266404 is an apocalyptic number.

It is an amenable number.

77266404 is an abundant number, since it is smaller than the sum of its proper divisors (118045986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77266404 is a wasteful number, since it uses less digits than its factorization.

77266404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146299 (or 2146294 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 77266404 is about 8790.1310570435. The cubic root of 77266404 is about 425.9221573035.

It can be divided in two parts, 772 and 66404, that added together give a palindrome (67176).

The spelling of 77266404 in words is "seventy-seven million, two hundred sixty-six thousand, four hundred four".