64667242 has 4 divisors (see below), whose sum is σ = 97000866. Its totient is φ = 32333620.

The previous prime is 64667219. The next prime is 64667249. The reversal of 64667242 is 24276646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32959081 + 31708161 = 5741^2 + 5631^2 .

It is not an unprimeable number, because it can be changed into a prime (64667249) 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 as a sum of consecutive naturals, namely, 16166809 + ... + 16166812.

Almost surely, 2^64667242 is an apocalyptic number.

64667242 is a deficient number, since it is larger than the sum of its proper divisors (32333624).

64667242 is a wasteful number, since it uses less digits than its factorization.

64667242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32333623.

The product of its digits is 96768, while the sum is 37.

The square root of 64667242 is about 8041.5944936312. The cubic root of 64667242 is about 401.3852844293.

The spelling of 64667242 in words is "sixty-four million, six hundred sixty-seven thousand, two hundred forty-two".