64678614 has 128 divisors (see below), whose sum is σ = 177085440. Its totient is φ = 15333120.

The previous prime is 64678597. The next prime is 64678619. The reversal of 64678614 is 41687646.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64678619) 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 63 ways as a sum of consecutive naturals, for example, 726682 + ... + 726770.

It is an arithmetic number, because the mean of its divisors is an integer number (1383480).

Almost surely, 2^64678614 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64678614, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88542720).

64678614 is an abundant number, since it is smaller than the sum of its proper divisors (112406826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64678614 is a wasteful number, since it uses less digits than its factorization.

64678614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 125 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 64678614 is about 8042.3015362519. The cubic root of 64678614 is about 401.4088114670.

The spelling of 64678614 in words is "sixty-four million, six hundred seventy-eight thousand, six hundred fourteen".