6667017381 has 12 divisors (see below), whose sum is σ = 10196615052. Its totient is φ = 4183226496.

The previous prime is 6667017349. The next prime is 6667017389. The reversal of 6667017381 is 1837107666.

It can be written as a sum of positive squares in 2 ways, for example, as 3429976356 + 3237041025 = 58566^2 + 56895^2 .

It is not a de Polignac number, because 6667017381 - 2⁵ = 6667017349 is a prime.

It is a super-2 number, since 2×6667017381² = 88898241517112198322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667017389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21787486 + ... + 21787791.

It is an arithmetic number, because the mean of its divisors is an integer number (849717921).

Almost surely, 2^6667017381 is an apocalyptic number.

It is an amenable number.

6667017381 is a deficient number, since it is larger than the sum of its proper divisors (3529597671).

6667017381 is a wasteful number, since it uses less digits than its factorization.

6667017381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43575300 (or 43575297 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 6667017381 is about 81651.8057424329. The cubic root of 6667017381 is about 1882.1050606657.

The spelling of 6667017381 in words is "six billion, six hundred sixty-seven million, seventeen thousand, three hundred eighty-one".