77966089 has 4 divisors (see below), whose sum is σ = 78019200. Its totient is φ = 77912980.

The previous prime is 77966071. The next prime is 77966107. The reversal of 77966089 is 98066977.

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 an interprime number because it is at equal distance from previous prime (77966071) and next prime (77966107).

It is a cyclic number.

It is not a de Polignac number, because 77966089 - 2¹³ = 77957897 is a prime.

It is a super-2 number, since 2×77966089² = 12157422067911842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77966039) 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, 24289 + ... + 27310.

It is an arithmetic number, because the mean of its divisors is an integer number (19504800).

Almost surely, 2^77966089 is an apocalyptic number.

It is an amenable number.

77966089 is a deficient number, since it is larger than the sum of its proper divisors (53111).

77966089 is a wasteful number, since it uses less digits than its factorization.

77966089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53110.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 77966089 is about 8829.8408252924. The cubic root of 77966089 is about 427.2039403361.

The spelling of 77966089 in words is "seventy-seven million, nine hundred sixty-six thousand, eighty-nine".