64966493 has 4 divisors (see below), whose sum is σ = 66067680. Its totient is φ = 63865308.

The previous prime is 64966481. The next prime is 64966547. The reversal of 64966493 is 39466946.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39466946 = 2 ⋅19733473.

It is a cyclic number.

It is not a de Polignac number, because 64966493 - 2⁴ = 64966477 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 (64966093) 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, 550505 + ... + 550622.

It is an arithmetic number, because the mean of its divisors is an integer number (16516920).

Almost surely, 2^64966493 is an apocalyptic number.

It is an amenable number.

64966493 is a deficient number, since it is larger than the sum of its proper divisors (1101187).

64966493 is a wasteful number, since it uses less digits than its factorization.

64966493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101186.

The product of its digits is 839808, while the sum is 47.

The square root of 64966493 is about 8060.1794645033. The cubic root of 64966493 is about 402.0034755440.

The spelling of 64966493 in words is "sixty-four million, nine hundred sixty-six thousand, four hundred ninety-three".