1425536666 has 16 divisors (see below), whose sum is σ = 2325281256. Its totient is φ = 652709376.

The previous prime is 1425536659. The next prime is 1425536681. The reversal of 1425536666 is 6666355241.

It can be written as a sum of positive squares in 4 ways, for example, as 1307184025 + 118352641 = 36155^2 + 10879^2 .

It is a super-2 number, since 2×1425536666² = 4064309572220791112, which contains 22 as substring.

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, 565331 + ... + 567846.

Almost surely, 2^1425536666 is an apocalyptic number.

1425536666 is a deficient number, since it is larger than the sum of its proper divisors (899744590).

1425536666 is a wasteful number, since it uses less digits than its factorization.

1425536666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133233.

The product of its digits is 777600, while the sum is 44.

The square root of 1425536666 is about 37756.2798220376. The cubic root of 1425536666 is about 1125.4498062380.

The spelling of 1425536666 in words is "one billion, four hundred twenty-five million, five hundred thirty-six thousand, six hundred sixty-six".