1226660065 has 8 divisors (see below), whose sum is σ = 1472180328. Its totient is φ = 981202560.

The previous prime is 1226660059. The next prime is 1226660077. The reversal of 1226660065 is 5600666221.

It can be written as a sum of positive squares in 4 ways, for example, as 371448529 + 855211536 = 19273^2 + 29244^2 .

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

It is not a de Polignac number, because 1226660065 - 2⁷ = 1226659937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1226660065.

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, 65829 + ... + 82381.

It is an arithmetic number, because the mean of its divisors is an integer number (184022541).

Almost surely, 2^1226660065 is an apocalyptic number.

It is an amenable number.

1226660065 is a deficient number, since it is larger than the sum of its proper divisors (245520263).

1226660065 is a wasteful number, since it uses less digits than its factorization.

1226660065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31379.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1226660065 is about 35023.7071852767. The cubic root of 1226660065 is about 1070.4705953967.

The spelling of 1226660065 in words is "one billion, two hundred twenty-six million, six hundred sixty thousand, sixty-five".