66315941 has 4 divisors (see below), whose sum is σ = 67440000. Its totient is φ = 65191884.

The previous prime is 66315911. The next prime is 66315943. The reversal of 66315941 is 14951366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66315941 - 2¹⁴ = 66299557 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 (66315943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561941 + ... + 562058.

It is an arithmetic number, because the mean of its divisors is an integer number (16860000).

Almost surely, 2^66315941 is an apocalyptic number.

It is an amenable number.

66315941 is a deficient number, since it is larger than the sum of its proper divisors (1124059).

66315941 is a wasteful number, since it uses less digits than its factorization.

66315941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124058.

The product of its digits is 19440, while the sum is 35.

The square root of 66315941 is about 8143.4600140235. The cubic root of 66315941 is about 404.7678209935.

The spelling of 66315941 in words is "sixty-six million, three hundred fifteen thousand, nine hundred forty-one".