1671220067 has 4 divisors (see below), whose sum is σ = 1823149176. Its totient is φ = 1519290960.

The previous prime is 1671220039. The next prime is 1671220073. The reversal of 1671220067 is 7600221761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7600221761 = 11 ⋅690929251.

It is not a de Polignac number, because 1671220067 - 2¹² = 1671215971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671220007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75964538 + ... + 75964559.

It is an arithmetic number, because the mean of its divisors is an integer number (455787294).

Almost surely, 2^1671220067 is an apocalyptic number.

1671220067 is a deficient number, since it is larger than the sum of its proper divisors (151929109).

1671220067 is a wasteful number, since it uses less digits than its factorization.

1671220067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151929108.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 1671220067 is about 40880.5585455972. The cubic root of 1671220067 is about 1186.7098503078.

The spelling of 1671220067 in words is "one billion, six hundred seventy-one million, two hundred twenty thousand, sixty-seven".