66532477 has 4 divisors (see below), whose sum is σ = 72580896. Its totient is φ = 60484060.

The previous prime is 66532447. The next prime is 66532511. The reversal of 66532477 is 77423566.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66532477 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 (66532447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3024193 + ... + 3024214.

It is an arithmetic number, because the mean of its divisors is an integer number (18145224).

Almost surely, 2^66532477 is an apocalyptic number.

It is an amenable number.

66532477 is a deficient number, since it is larger than the sum of its proper divisors (6048419).

66532477 is a wasteful number, since it uses less digits than its factorization.

66532477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048418.

The product of its digits is 211680, while the sum is 40.

The square root of 66532477 is about 8156.7442647174. The cubic root of 66532477 is about 405.2078940787.

The spelling of 66532477 in words is "sixty-six million, five hundred thirty-two thousand, four hundred seventy-seven".