66461525 has 48 divisors (see below), whose sum is σ = 95827200. Its totient is φ = 45308160.

The previous prime is 66461477. The next prime is 66461557. The reversal of 66461525 is 52516466.

It is not a de Polignac number, because 66461525 - 2²² = 62267221 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 47 ways as a sum of consecutive naturals, for example, 290111 + ... + 290339.

It is an arithmetic number, because the mean of its divisors is an integer number (1996400).

Almost surely, 2^66461525 is an apocalyptic number.

66461525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66461525 is a deficient number, since it is larger than the sum of its proper divisors (29365675).

66461525 is a wasteful number, since it uses less digits than its factorization.

66461525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 313 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 66461525 is about 8152.3938202224. The cubic root of 66461525 is about 405.0638013594.

The spelling of 66461525 in words is "sixty-six million, four hundred sixty-one thousand, five hundred twenty-five".