66161614 has 4 divisors (see below), whose sum is σ = 99242424. Its totient is φ = 33080806.

The previous prime is 66161611. The next prime is 66161617. The reversal of 66161614 is 41616166.

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

It is an interprime number because it is at equal distance from previous prime (66161611) and next prime (66161617).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66161611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16540402 + ... + 16540405.

It is an arithmetic number, because the mean of its divisors is an integer number (24810606).

Almost surely, 2^66161614 is an apocalyptic number.

66161614 is a deficient number, since it is larger than the sum of its proper divisors (33080810).

66161614 is a wasteful number, since it uses less digits than its factorization.

66161614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33080809.

The product of its digits is 5184, while the sum is 31.

The square root of 66161614 is about 8133.9789771059. The cubic root of 66161614 is about 404.4535922593.

The spelling of 66161614 in words is "sixty-six million, one hundred sixty-one thousand, six hundred fourteen".