66155349 has 8 divisors (see below), whose sum is σ = 94992352. Its totient is φ = 40710960.

The previous prime is 66155281. The next prime is 66155387. The reversal of 66155349 is 94355166.

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

It is not a de Polignac number, because 66155349 - 2¹⁶ = 66089813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1696291 = 66155349 / (6 + 6 + 1 + 5 + 5 + 3 + 4 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155389) 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, 848107 + ... + 848184.

It is an arithmetic number, because the mean of its divisors is an integer number (11874044).

Almost surely, 2^66155349 is an apocalyptic number.

It is an amenable number.

66155349 is a deficient number, since it is larger than the sum of its proper divisors (28837003).

66155349 is a wasteful number, since it uses less digits than its factorization.

66155349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696307.

The product of its digits is 97200, while the sum is 39.

The square root of 66155349 is about 8133.5938551172. The cubic root of 66155349 is about 404.4408256334.

The spelling of 66155349 in words is "sixty-six million, one hundred fifty-five thousand, three hundred forty-nine".