66252477 has 4 divisors (see below), whose sum is σ = 88336640. Its totient is φ = 44168316.

The previous prime is 66252467. The next prime is 66252493. The reversal of 66252477 is 77425266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66252477 - 2⁶ = 66252413 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 (66252467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11042077 + ... + 11042082.

It is an arithmetic number, because the mean of its divisors is an integer number (22084160).

Almost surely, 2^66252477 is an apocalyptic number.

It is an amenable number.

66252477 is a deficient number, since it is larger than the sum of its proper divisors (22084163).

66252477 is a wasteful number, since it uses less digits than its factorization.

66252477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22084162.

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

The square root of 66252477 is about 8139.5624575280. The cubic root of 66252477 is about 404.6386595710.

The spelling of 66252477 in words is "sixty-six million, two hundred fifty-two thousand, four hundred seventy-seven".