66533477 has 4 divisors (see below), whose sum is σ = 66786720. Its totient is φ = 66280236.

The previous prime is 66533449. The next prime is 66533483. The reversal of 66533477 is 77433566.

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 not a de Polignac number, because 66533477 - 2⁶ = 66533413 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 (66533407) 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, 126227 + ... + 126752.

It is an arithmetic number, because the mean of its divisors is an integer number (16696680).

Almost surely, 2^66533477 is an apocalyptic number.

It is an amenable number.

66533477 is a deficient number, since it is larger than the sum of its proper divisors (253243).

66533477 is a wasteful number, since it uses less digits than its factorization.

66533477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253242.

The product of its digits is 317520, while the sum is 41.

The square root of 66533477 is about 8156.8055634544. The cubic root of 66533477 is about 405.2099241943.

The spelling of 66533477 in words is "sixty-six million, five hundred thirty-three thousand, four hundred seventy-seven".