64777652 has 6 divisors (see below), whose sum is σ = 113360898. Its totient is φ = 32388824.

The previous prime is 64777649. The next prime is 64777711. The reversal of 64777652 is 25677746.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 8317456 = 7514^2 + 2884^2 .

It is a super-2 number, since 2×64777652² = 8392288397266208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8097203 + ... + 8097210.

It is an arithmetic number, because the mean of its divisors is an integer number (18893483).

Almost surely, 2^64777652 is an apocalyptic number.

It is an amenable number.

64777652 is a deficient number, since it is larger than the sum of its proper divisors (48583246).

64777652 is a wasteful number, since it uses less digits than its factorization.

64777652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194417 (or 16194415 counting only the distinct ones).

The product of its digits is 493920, while the sum is 44.

The square root of 64777652 is about 8048.4564979877. The cubic root of 64777652 is about 401.6135903958.

The spelling of 64777652 in words is "sixty-four million, seven hundred seventy-seven thousand, six hundred fifty-two".