671767077 has 4 divisors (see below), whose sum is σ = 895689440. Its totient is φ = 447844716.

The previous prime is 671767069. The next prime is 671767081. The reversal of 671767077 is 770767176.

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 not a de Polignac number, because 671767077 - 2³ = 671767069 is a prime.

It is a super-2 number, since 2×671767077² = 902542011482247858, 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 (671767007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111961177 + ... + 111961182.

It is an arithmetic number, because the mean of its divisors is an integer number (223922360).

Almost surely, 2^671767077 is an apocalyptic number.

It is an amenable number.

671767077 is a deficient number, since it is larger than the sum of its proper divisors (223922363).

671767077 is a wasteful number, since it uses less digits than its factorization.

671767077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223922362.

The product of its (nonzero) digits is 605052, while the sum is 48.

The square root of 671767077 is about 25918.4698043692. The cubic root of 671767077 is about 875.8026168052.

Subtracting 671767077 from its reverse (770767176), we obtain a palindrome (99000099).

The spelling of 671767077 in words is "six hundred seventy-one million, seven hundred sixty-seven thousand, seventy-seven".