7520066 has 4 divisors (see below), whose sum is σ = 11280102. Its totient is φ = 3760032.

The previous prime is 7520063. The next prime is 7520083. The reversal of 7520066 is 6600257.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4558225 + 2961841 = 2135^2 + 1721^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7520063) 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 as a sum of consecutive naturals, namely, 1880015 + ... + 1880018.

Almost surely, 2^7520066 is an apocalyptic number.

7520066 is a deficient number, since it is larger than the sum of its proper divisors (3760036).

7520066 is a wasteful number, since it uses less digits than its factorization.

7520066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760035.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 7520066 is about 2742.2738739958. The cubic root of 7520066 is about 195.9177949035.

The spelling of 7520066 in words is "seven million, five hundred twenty thousand, sixty-six".