64776530 has 48 divisors (see below), whose sum is σ = 146081880. Its totient is φ = 20498688.

The previous prime is 64776521. The next prime is 64776539. The reversal of 64776530 is 3567746.

It is an interprime number because it is at equal distance from previous prime (64776521) and next prime (64776539).

It can be written as a sum of positive squares in 4 ways, for example, as 55160329 + 9616201 = 7427^2 + 3101^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64776539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1286 + ... + 11454.

Almost surely, 2^64776530 is an apocalyptic number.

64776530 is an abundant number, since it is smaller than the sum of its proper divisors (81305350).

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

64776530 is a wasteful number, since it uses less digits than its factorization.

64776530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203 (or 10196 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 64776530 is about 8048.3867948801. The cubic root of 64776530 is about 401.6112716277.

It can be divided in two parts, 647 and 76530, that added together give a palindrome (77177).

The spelling of 64776530 in words is "sixty-four million, seven hundred seventy-six thousand, five hundred thirty".