77774027 has 4 divisors (see below), whose sum is σ = 80455920. Its totient is φ = 75092136.

The previous prime is 77774023. The next prime is 77774029. The reversal of 77774027 is 72047777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72047777 = 331 ⋅217667.

It is not a de Polignac number, because 77774027 - 2² = 77774023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77774023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340903 + ... + 1340960.

It is an arithmetic number, because the mean of its divisors is an integer number (20113980).

Almost surely, 2^77774027 is an apocalyptic number.

77774027 is a deficient number, since it is larger than the sum of its proper divisors (2681893).

77774027 is a wasteful number, since it uses less digits than its factorization.

77774027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681892.

The product of its (nonzero) digits is 134456, while the sum is 41.

The square root of 77774027 is about 8818.9583852063. The cubic root of 77774027 is about 426.8528598838.

The spelling of 77774027 in words is "seventy-seven million, seven hundred seventy-four thousand, twenty-seven".