66432077 has 4 divisors (see below), whose sum is σ = 66448380. Its totient is φ = 66415776.

The previous prime is 66432071. The next prime is 66432089. The reversal of 66432077 is 77023466.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4116841 + 62315236 = 2029^2 + 7894^2 .

It is a cyclic number.

It is not a de Polignac number, because 66432077 - 2⁴ = 66432061 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66432071) 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, 3953 + ... + 12185.

It is an arithmetic number, because the mean of its divisors is an integer number (16612095).

Almost surely, 2^66432077 is an apocalyptic number.

It is an amenable number.

66432077 is a deficient number, since it is larger than the sum of its proper divisors (16303).

66432077 is an equidigital number, since it uses as much as digits as its factorization.

66432077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16302.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 66432077 is about 8150.5875248352. The cubic root of 66432077 is about 405.0039668361.

The spelling of 66432077 in words is "sixty-six million, four hundred thirty-two thousand, seventy-seven".