64770650 has 36 divisors (see below), whose sum is σ = 140147838. Its totient is φ = 22206240.

The previous prime is 64770649. The next prime is 64770661. The reversal of 64770650 is 5607746.

It can be written as a sum of positive squares in 3 ways, for example, as 57047809 + 7722841 = 7553^2 + 2779^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 64770650.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10769 + ... + 15668.

Almost surely, 2^64770650 is an apocalyptic number.

64770650 is an abundant number, since it is smaller than the sum of its proper divisors (75377188).

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

64770650 is a wasteful number, since it uses less digits than its factorization.

64770650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26463 (or 26451 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 64770650 is about 8048.0214959951. The cubic root of 64770650 is about 401.5991193573.

The spelling of 64770650 in words is "sixty-four million, seven hundred seventy thousand, six hundred fifty".