1667261465 has 8 divisors (see below), whose sum is σ = 2000999688. Its totient is φ = 1333618560.

The previous prime is 1667261441. The next prime is 1667261473. The reversal of 1667261465 is 5641627661.

It can be written as a sum of positive squares in 4 ways, for example, as 555639184 + 1111622281 = 23572^2 + 33341^2 .

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

It is not a de Polignac number, because 1667261465 - 2⁸ = 1667261209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23039 + ... + 62171.

It is an arithmetic number, because the mean of its divisors is an integer number (250124961).

Almost surely, 2^1667261465 is an apocalyptic number.

It is an amenable number.

1667261465 is a deficient number, since it is larger than the sum of its proper divisors (333738223).

1667261465 is an equidigital number, since it uses as much as digits as its factorization.

1667261465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47659.

The product of its digits is 362880, while the sum is 44.

The square root of 1667261465 is about 40832.1131586402. The cubic root of 1667261465 is about 1185.7721270023.

The spelling of 1667261465 in words is "one billion, six hundred sixty-seven million, two hundred sixty-one thousand, four hundred sixty-five".