1967866465 has 4 divisors (see below), whose sum is σ = 2361439764. Its totient is φ = 1574293168.

The previous prime is 1967866441. The next prime is 1967866477. The reversal of 1967866465 is 5646687691.

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

It can be written as a sum of positive squares in 2 ways, for example, as 473889361 + 1493977104 = 21769^2 + 38652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1967866465 - 2⁷ = 1967866337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196786642 + ... + 196786651.

It is an arithmetic number, because the mean of its divisors is an integer number (590359941).

Almost surely, 2^1967866465 is an apocalyptic number.

It is an amenable number.

1967866465 is a deficient number, since it is larger than the sum of its proper divisors (393573299).

1967866465 is an equidigital number, since it uses as much as digits as its factorization.

1967866465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393573298.

The product of its digits is 13063680, while the sum is 58.

The square root of 1967866465 is about 44360.6409444228. The cubic root of 1967866465 is about 1253.1369668324.

The spelling of 1967866465 in words is "one billion, nine hundred sixty-seven million, eight hundred sixty-six thousand, four hundred sixty-five".