1671211221667 has 8 divisors (see below), whose sum is σ = 1905634515456. Its totient is φ = 1451912011392.

The previous prime is 1671211221661. The next prime is 1671211221671. The reversal of 1671211221667 is 7661221121761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1671211221667 - 2³⁵ = 1636851483299 is a prime.

It is a super-2 number, since 2×1671211221667² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1671211221661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3781020643 + ... + 3781021084.

It is an arithmetic number, because the mean of its divisors is an integer number (238204314432).

Almost surely, 2^{1671211221667} is an apocalyptic number.

1671211221667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1671211221667 is a deficient number, since it is larger than the sum of its proper divisors (234423293789).

1671211221667 is a wasteful number, since it uses less digits than its factorization.

1671211221667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7562041757.

The product of its digits is 84672, while the sum is 43.

The spelling of 1671211221667 in words is "one trillion, six hundred seventy-one billion, two hundred eleven million, two hundred twenty-one thousand, six hundred sixty-seven".