66965413 has 4 divisors (see below), whose sum is σ = 68100480. Its totient is φ = 65830348.

The previous prime is 66965399. The next prime is 66965417. The reversal of 66965413 is 31456966.

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 a de Polignac number, because none of the positive numbers 2^k-66965413 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 (66965417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567445 + ... + 567562.

It is an arithmetic number, because the mean of its divisors is an integer number (17025120).

Almost surely, 2^66965413 is an apocalyptic number.

It is an amenable number.

66965413 is a deficient number, since it is larger than the sum of its proper divisors (1135067).

66965413 is a wasteful number, since it uses less digits than its factorization.

66965413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135066.

The product of its digits is 116640, while the sum is 40.

The square root of 66965413 is about 8183.2397618547. The cubic root of 66965413 is about 406.0849090776.

The spelling of 66965413 in words is "sixty-six million, nine hundred sixty-five thousand, four hundred thirteen".