66155141 has 8 divisors (see below), whose sum is σ = 71524824. Its totient is φ = 60825600.

The previous prime is 66155137. The next prime is 66155191. The reversal of 66155141 is 14155166.

It can be written as a sum of positive squares in 4 ways, for example, as 1288225 + 64866916 = 1135^2 + 8054^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66155141 - 2² = 66155137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155191) 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, 6560 + ... + 13241.

It is an arithmetic number, because the mean of its divisors is an integer number (8940603).

Almost surely, 2^66155141 is an apocalyptic number.

It is an amenable number.

66155141 is a deficient number, since it is larger than the sum of its proper divisors (5369683).

66155141 is a wasteful number, since it uses less digits than its factorization.

66155141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20071.

The product of its digits is 3600, while the sum is 29.

The square root of 66155141 is about 8133.5810686315. The cubic root of 66155141 is about 404.4404017635.

The spelling of 66155141 in words is "sixty-six million, one hundred fifty-five thousand, one hundred forty-one".