66522477 has 16 divisors (see below), whose sum is σ = 106703360. Its totient is φ = 36011952.

The previous prime is 66522457. The next prime is 66522487. The reversal of 66522477 is 77422566.

It is a happy number.

It is not a de Polignac number, because 66522477 - 2⁶ = 66522413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66522457) 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 in 15 ways as a sum of consecutive naturals, for example, 82963 + ... + 83760.

It is an arithmetic number, because the mean of its divisors is an integer number (6668960).

Almost surely, 2^66522477 is an apocalyptic number.

It is an amenable number.

66522477 is a deficient number, since it is larger than the sum of its proper divisors (40180883).

66522477 is a wasteful number, since it uses less digits than its factorization.

66522477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166752.

The product of its digits is 141120, while the sum is 39.

The square root of 66522477 is about 8156.1312520091. The cubic root of 66522477 is about 405.1875918035.

The spelling of 66522477 in words is "sixty-six million, five hundred twenty-two thousand, four hundred seventy-seven".