66477 has 4 divisors (see below), whose sum is σ = 88640. Its totient is φ = 44316.

The previous prime is 66467. The next prime is 66491. The reversal of 66477 is 77466.

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 66477 - 2⁶ = 66413 is a prime.

It is a D-number.

It is a Duffinian number.

66477 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66477.

It is not an unprimeable number, because it can be changed into a prime (66457) 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, 11077 + ... + 11082.

It is an arithmetic number, because the mean of its divisors is an integer number (22160).

2⁶⁶⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

66477 is a deficient number, since it is larger than the sum of its proper divisors (22163).

66477 is a wasteful number, since it uses less digits than its factorization.

66477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22162.

The product of its digits is 7056, while the sum is 30.

The square root of 66477 is about 257.8313402207. The cubic root of 66477 is about 40.5095237472.

It can be divided in two parts, 664 and 77, that added together give a triangular number (741 = T₃₈).

The spelling of 66477 in words is "sixty-six thousand, four hundred seventy-seven".