1520423066 has 4 divisors (see below), whose sum is σ = 2280634602. Its totient is φ = 760211532.

The previous prime is 1520423063. The next prime is 1520423071. The reversal of 1520423066 is 6603240251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6603240251 = 62219 ⋅106129.

It can be written as a sum of positive squares in only one way, i.e., 1446204841 + 74218225 = 38029^2 + 8615^2 .

It is not an unprimeable number, because it can be changed into a prime (1520423063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380105765 + ... + 380105768.

Almost surely, 2^1520423066 is an apocalyptic number.

1520423066 is a deficient number, since it is larger than the sum of its proper divisors (760211536).

1520423066 is an equidigital number, since it uses as much as digits as its factorization.

1520423066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760211535.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1520423066 is about 38992.6027087190. The cubic root of 1520423066 is about 1149.8860797046.

The spelling of 1520423066 in words is "one billion, five hundred twenty million, four hundred twenty-three thousand, sixty-six".