66161001 has 8 divisors (see below), whose sum is σ = 88497760. Its totient is φ = 43965792.

The previous prime is 66160987. The next prime is 66161009. The reversal of 66161001 is 10016166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66161001 - 2⁶ = 66160937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66161009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34291 + ... + 36168.

It is an arithmetic number, because the mean of its divisors is an integer number (11062220).

Almost surely, 2^66161001 is an apocalyptic number.

It is an amenable number.

66161001 is a deficient number, since it is larger than the sum of its proper divisors (22336759).

66161001 is a wasteful number, since it uses less digits than its factorization.

66161001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70775.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 66161001 is about 8133.9412955836. The cubic root of 66161001 is about 404.4523431422.

Adding to 66161001 its reverse (10016166), we get a palindrome (76177167).

The spelling of 66161001 in words is "sixty-six million, one hundred sixty-one thousand, one".