64820566 has 8 divisors (see below), whose sum is σ = 100367424. Its totient is φ = 31364760.

The previous prime is 64820551. The next prime is 64820573. The reversal of 64820566 is 66502846.

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

It is a congruent number.

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, 522685 + ... + 522808.

It is an arithmetic number, because the mean of its divisors is an integer number (12545928).

Almost surely, 2^64820566 is an apocalyptic number.

64820566 is a deficient number, since it is larger than the sum of its proper divisors (35546858).

64820566 is a wasteful number, since it uses less digits than its factorization.

64820566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045526.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 64820566 is about 8051.1220336050. The cubic root of 64820566 is about 401.7022580178.

The spelling of 64820566 in words is "sixty-four million, eight hundred twenty thousand, five hundred sixty-six".