64662155 has 4 divisors (see below), whose sum is σ = 77594592. Its totient is φ = 51729720.

The previous prime is 64662137. The next prime is 64662163. The reversal of 64662155 is 55126646.

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

It is not a de Polignac number, because 64662155 - 2¹⁰ = 64661131 is a prime.

It is a Duffinian 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, 6466211 + ... + 6466220.

It is an arithmetic number, because the mean of its divisors is an integer number (19398648).

Almost surely, 2^64662155 is an apocalyptic number.

64662155 is a deficient number, since it is larger than the sum of its proper divisors (12932437).

64662155 is a wasteful number, since it uses less digits than its factorization.

64662155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932436.

The product of its digits is 43200, while the sum is 35.

The square root of 64662155 is about 8041.2781944166. The cubic root of 64662155 is about 401.3747592627.

The spelling of 64662155 in words is "sixty-four million, six hundred sixty-two thousand, one hundred fifty-five".