64770880 has 28 divisors (see below), whose sum is σ = 154236420. Its totient is φ = 25908224.

The previous prime is 64770869. The next prime is 64770917. The reversal of 64770880 is 8807746.

It can be written as a sum of positive squares in 2 ways, for example, as 23503104 + 41267776 = 4848^2 + 6424^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100885 + ... + 101524.

Almost surely, 2^64770880 is an apocalyptic number.

It is an amenable number.

64770880 is an abundant number, since it is smaller than the sum of its proper divisors (89465540).

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

64770880 is a wasteful number, since it uses less digits than its factorization.

64770880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202426 (or 202416 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 64770880 is about 8048.0357852087. The cubic root of 64770880 is about 401.5995947150.

The spelling of 64770880 in words is "sixty-four million, seven hundred seventy thousand, eight hundred eighty".