64782506 has 4 divisors (see below), whose sum is σ = 97173762. Its totient is φ = 32391252.

The previous prime is 64782503. The next prime is 64782527. The reversal of 64782506 is 60528746.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34916281 + 29866225 = 5909^2 + 5465^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64782506.

It is not an unprimeable number, because it can be changed into a prime (64782503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16195625 + ... + 16195628.

Almost surely, 2^64782506 is an apocalyptic number.

64782506 is a deficient number, since it is larger than the sum of its proper divisors (32391256).

64782506 is a wasteful number, since it uses less digits than its factorization.

64782506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32391255.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 64782506 is about 8048.7580408408. The cubic root of 64782506 is about 401.6236215491.

The spelling of 64782506 in words is "sixty-four million, seven hundred eighty-two thousand, five hundred six".