64877760 has 140 divisors (see below), whose sum is σ = 230873808. Its totient is φ = 17293824.

The previous prime is 64877753. The next prime is 64877767. The reversal of 64877760 is 6777846.

It is an interprime number because it is at equal distance from previous prime (64877753) and next prime (64877767).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64877767) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24669 + ... + 27171.

Almost surely, 2^64877760 is an apocalyptic number.

64877760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64877760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115436904).

64877760 is an abundant number, since it is smaller than the sum of its proper divisors (165996048).

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

64877760 is a wasteful number, since it uses less digits than its factorization.

64877760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532 (or 2513 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 64877760 is about 8054.6731777273. The cubic root of 64877760 is about 401.8203697346.

The spelling of 64877760 in words is "sixty-four million, eight hundred seventy-seven thousand, seven hundred sixty".