64820330 has 8 divisors (see below), whose sum is σ = 116676612. Its totient is φ = 25928128.

The previous prime is 64820299. The next prime is 64820333. The reversal of 64820330 is 3302846.

It can be written as a sum of positive squares in 2 ways, for example, as 58997761 + 5822569 = 7681^2 + 2413^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 64820330.

It is not an unprimeable number, because it can be changed into a prime (64820333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241007 + ... + 3241026.

Almost surely, 2^64820330 is an apocalyptic number.

64820330 is a deficient number, since it is larger than the sum of its proper divisors (51856282).

64820330 is a wasteful number, since it uses less digits than its factorization.

64820330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6482040.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 64820330 is about 8051.1073772494. The cubic root of 64820330 is about 401.7017705087.

The spelling of 64820330 in words is "sixty-four million, eight hundred twenty thousand, three hundred thirty".