64520266 has 8 divisors (see below), whose sum is σ = 96843780. Its totient is φ = 32239008.

The previous prime is 64520231. The next prime is 64520293. The reversal of 64520266 is 66202546.

It can be written as a sum of positive squares in 2 ways, for example, as 62869041 + 1651225 = 7929^2 + 1285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6421 + ... + 13048.

Almost surely, 2^64520266 is an apocalyptic number.

64520266 is a deficient number, since it is larger than the sum of its proper divisors (32323514).

64520266 is a wasteful number, since it uses less digits than its factorization.

64520266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21128.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 64520266 is about 8032.4508090620. The cubic root of 64520266 is about 401.0809636625.

The spelling of 64520266 in words is "sixty-four million, five hundred twenty thousand, two hundred sixty-six".