66434078 has 4 divisors (see below), whose sum is σ = 99651120. Its totient is φ = 33217038.

The previous prime is 66434033. The next prime is 66434107. The reversal of 66434078 is 87043466.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16608518 + ... + 16608521.

It is an arithmetic number, because the mean of its divisors is an integer number (24912780).

Almost surely, 2^66434078 is an apocalyptic number.

66434078 is a deficient number, since it is larger than the sum of its proper divisors (33217042).

66434078 is a wasteful number, since it uses less digits than its factorization.

66434078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33217041.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 66434078 is about 8150.7102757981. The cubic root of 66434078 is about 405.0080331689.

The spelling of 66434078 in words is "sixty-six million, four hundred thirty-four thousand, seventy-eight".