66477039 has 4 divisors (see below), whose sum is σ = 88636056. Its totient is φ = 44318024.

The previous prime is 66477017. The next prime is 66477041. The reversal of 66477039 is 93077466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66477039 - 2⁷ = 66476911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66477139) 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, 11079504 + ... + 11079509.

It is an arithmetic number, because the mean of its divisors is an integer number (22159014).

Almost surely, 2^66477039 is an apocalyptic number.

66477039 is a deficient number, since it is larger than the sum of its proper divisors (22159017).

66477039 is a wasteful number, since it uses less digits than its factorization.

66477039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22159016.

The product of its (nonzero) digits is 190512, while the sum is 42.

The square root of 66477039 is about 8153.3452643685. The cubic root of 66477039 is about 405.0953166906.

The spelling of 66477039 in words is "sixty-six million, four hundred seventy-seven thousand, thirty-nine".