78276669 has 4 divisors (see below), whose sum is σ = 104368896. Its totient is φ = 52184444.

The previous prime is 78276647. The next prime is 78276673. The reversal of 78276669 is 96667287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78276669 - 2⁹ = 78276157 is a prime.

It is a super-2 number, since 2×78276669² = 12254473819471122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78272669) 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 3 ways as a sum of consecutive naturals, for example, 13046109 + ... + 13046114.

It is an arithmetic number, because the mean of its divisors is an integer number (26092224).

Almost surely, 2^78276669 is an apocalyptic number.

It is an amenable number.

78276669 is a deficient number, since it is larger than the sum of its proper divisors (26092227).

78276669 is a wasteful number, since it uses less digits than its factorization.

78276669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26092226.

The product of its digits is 1524096, while the sum is 51.

The square root of 78276669 is about 8847.4102990649. The cubic root of 78276669 is about 427.7704482068.

The spelling of 78276669 in words is "seventy-eight million, two hundred seventy-six thousand, six hundred sixty-nine".