1513264666 has 4 divisors (see below), whose sum is σ = 2269897002. Its totient is φ = 756632332.

The previous prime is 1513264661. The next prime is 1513264667. The reversal of 1513264666 is 6664623151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6664623151 = 599 ⋅11126249.

It can be written as a sum of positive squares in only one way, i.e., 1226470441 + 286794225 = 35021^2 + 16935^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1513264661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378316165 + ... + 378316168.

Almost surely, 2^1513264666 is an apocalyptic number.

1513264666 is a deficient number, since it is larger than the sum of its proper divisors (756632336).

1513264666 is an equidigital number, since it uses as much as digits as its factorization.

1513264666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756632335.

The product of its digits is 155520, while the sum is 40.

The square root of 1513264666 is about 38900.7026414691. The cubic root of 1513264666 is about 1148.0786230029.

The spelling of 1513264666 in words is "one billion, five hundred thirteen million, two hundred sixty-four thousand, six hundred sixty-six".