66148718 has 4 divisors (see below), whose sum is σ = 99223080. Its totient is φ = 33074358.

The previous prime is 66148697. The next prime is 66148727. The reversal of 66148718 is 81784166.

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

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, 16537178 + ... + 16537181.

It is an arithmetic number, because the mean of its divisors is an integer number (24805770).

Almost surely, 2^66148718 is an apocalyptic number.

66148718 is a deficient number, since it is larger than the sum of its proper divisors (33074362).

66148718 is a wasteful number, since it uses less digits than its factorization.

66148718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33074361.

The product of its digits is 64512, while the sum is 41.

The square root of 66148718 is about 8133.1862145164. The cubic root of 66148718 is about 404.4273123057.

It can be divided in two parts, 66148 and 718, that added together give a palindrome (66866).

The spelling of 66148718 in words is "sixty-six million, one hundred forty-eight thousand, seven hundred eighteen".