667437771071 has 4 divisors (see below), whose sum is σ = 667439666232. Its totient is φ = 667435875912.

The previous prime is 667437771067. The next prime is 667437771083. The reversal of 667437771071 is 170177734766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667437771071 - 2² = 667437771067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667437770998 and 667437771016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667437771061) 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, 246320 + ... + 1181333.

It is an arithmetic number, because the mean of its divisors is an integer number (166859916558).

Almost surely, 2^667437771071 is an apocalyptic number.

667437771071 is a deficient number, since it is larger than the sum of its proper divisors (1895161).

667437771071 is a wasteful number, since it uses less digits than its factorization.

667437771071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895160.

The product of its (nonzero) digits is 7260624, while the sum is 56.

The spelling of 667437771071 in words is "six hundred sixty-seven billion, four hundred thirty-seven million, seven hundred seventy-one thousand, seventy-one".