76661269 has 4 divisors (see below), whose sum is σ = 76710240. Its totient is φ = 76612300.

The previous prime is 76661251. The next prime is 76661281. The reversal of 76661269 is 96216667.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96216667 = 359 ⋅268013.

It is a cyclic number.

It is not a de Polignac number, because 76661269 - 2¹¹ = 76659221 is a prime.

It is a super-2 number, since 2×76661269² = 11753900329380722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76661209) 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, 22057 + ... + 25294.

It is an arithmetic number, because the mean of its divisors is an integer number (19177560).

Almost surely, 2^76661269 is an apocalyptic number.

It is an amenable number.

76661269 is a deficient number, since it is larger than the sum of its proper divisors (48971).

76661269 is a wasteful number, since it uses less digits than its factorization.

76661269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48970.

The product of its digits is 163296, while the sum is 43.

The square root of 76661269 is about 8755.6421237965. The cubic root of 76661269 is about 424.8073295072.

The spelling of 76661269 in words is "seventy-six million, six hundred sixty-one thousand, two hundred sixty-nine".