1630421266 has 8 divisors (see below), whose sum is σ = 2449597500. Its totient is φ = 813888768.

The previous prime is 1630421257. The next prime is 1630421269. The reversal of 1630421266 is 6621240361.

It can be written as a sum of positive squares in 2 ways, for example, as 1494209025 + 136212241 = 38655^2 + 11671^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1630421269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659391 + ... + 661858.

Almost surely, 2^1630421266 is an apocalyptic number.

1630421266 is a deficient number, since it is larger than the sum of its proper divisors (819176234).

1630421266 is a wasteful number, since it uses less digits than its factorization.

1630421266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321868.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1630421266 is about 40378.4752807730. The cubic root of 1630421266 is about 1176.9732988776.

The spelling of 1630421266 in words is "one billion, six hundred thirty million, four hundred twenty-one thousand, two hundred sixty-six".