1264489066 has 16 divisors (see below), whose sum is σ = 1906821000. Its totient is φ = 628891648.

The previous prime is 1264489063. The next prime is 1264489073. The reversal of 1264489066 is 6609844621.

It can be written as a sum of positive squares in 4 ways, for example, as 1074462841 + 190026225 = 32779^2 + 13785^2 .

It is not an unprimeable number, because it can be changed into a prime (1264489063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315000 + ... + 318988.

Almost surely, 2^1264489066 is an apocalyptic number.

1264489066 is a deficient number, since it is larger than the sum of its proper divisors (642331934).

1264489066 is a wasteful number, since it uses less digits than its factorization.

1264489066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 1264489066 is about 35559.6550320725. The cubic root of 1264489066 is about 1081.3634659857.

The spelling of 1264489066 in words is "one billion, two hundred sixty-four million, four hundred eighty-nine thousand, sixty-six".