64642966 has 8 divisors (see below), whose sum is σ = 97168320. Its totient is φ = 32253528.

The previous prime is 64642939. The next prime is 64642969. The reversal of 64642966 is 66924646.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642969) 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, 32781 + ... + 34696.

It is an arithmetic number, because the mean of its divisors is an integer number (12146040).

Almost surely, 2^64642966 is an apocalyptic number.

64642966 is a deficient number, since it is larger than the sum of its proper divisors (32525354).

64642966 is a wasteful number, since it uses less digits than its factorization.

64642966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67958.

The product of its digits is 373248, while the sum is 43.

The square root of 64642966 is about 8040.0849498000. The cubic root of 64642966 is about 401.3350516354.

The spelling of 64642966 in words is "sixty-four million, six hundred forty-two thousand, nine hundred sixty-six".