1247060664 has 32 divisors (see below), whose sum is σ = 3464058000. Its totient is φ = 415686816.

The previous prime is 1247060663. The next prime is 1247060669. The reversal of 1247060664 is 4660607421.

1247060664 is a `hidden beast` number, since 1 + 2 + 47 + 0 + 606 + 6 + 4 = 666.

It is a super-2 number, since 2×1247060664² = 3110320599392241792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247060663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2886499 + ... + 2886930.

Almost surely, 2^1247060664 is an apocalyptic number.

It is an amenable number.

1247060664 is an abundant number, since it is smaller than the sum of its proper divisors (2216997336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1247060664 is a wasteful number, since it uses less digits than its factorization.

1247060664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773444 (or 5773434 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1247060664 is about 35313.7461054474. The cubic root of 1247060664 is about 1076.3723346717.

The spelling of 1247060664 in words is "one billion, two hundred forty-seven million, sixty thousand, six hundred sixty-four".