64607764 has 12 divisors (see below), whose sum is σ = 121760884. Its totient is φ = 29818944.

The previous prime is 64607761. The next prime is 64607797. The reversal of 64607764 is 46770646.

It can be written as a sum of positive squares in 2 ways, for example, as 28005264 + 36602500 = 5292^2 + 6050^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64607761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621177 + ... + 621280.

Almost surely, 2^64607764 is an apocalyptic number.

It is an amenable number.

64607764 is a deficient number, since it is larger than the sum of its proper divisors (57153120).

64607764 is a wasteful number, since it uses less digits than its factorization.

64607764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242474 (or 1242472 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 64607764 is about 8037.8954957128. The cubic root of 64607764 is about 401.2621880143.

The spelling of 64607764 in words is "sixty-four million, six hundred seven thousand, seven hundred sixty-four".