1966313671 has 4 divisors (see below), whose sum is σ = 2247215632. Its totient is φ = 1685411712.

The previous prime is 1966313639. The next prime is 1966313729. The reversal of 1966313671 is 1763136691.

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 1966313671 - 2⁵ = 1966313639 is a prime.

It is a super-2 number, since 2×1966313671² = 7732778905522992482, 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 (1966313771) 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, 140450970 + ... + 140450983.

It is an arithmetic number, because the mean of its divisors is an integer number (561803908).

Almost surely, 2^1966313671 is an apocalyptic number.

1966313671 is a deficient number, since it is larger than the sum of its proper divisors (280901961).

1966313671 is an equidigital number, since it uses as much as digits as its factorization.

1966313671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280901960.

The product of its digits is 122472, while the sum is 43.

The square root of 1966313671 is about 44343.1355567014. The cubic root of 1966313671 is about 1252.8072737980.

The spelling of 1966313671 in words is "one billion, nine hundred sixty-six million, three hundred thirteen thousand, six hundred seventy-one".