664155063 has 24 divisors (see below), whose sum is σ = 1127053200. Its totient is φ = 371554560.

The previous prime is 664155043. The next prime is 664155091. The reversal of 664155063 is 360551466.

664155063 is a `hidden beast` number, since 6 + 6 + 41 + 550 + 63 = 666.

It is not a de Polignac number, because 664155063 - 2⁶ = 664154999 is a prime.

It is a super-2 number, since 2×664155063² = 882203895417067938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664155043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256738 + ... + 259311.

It is an arithmetic number, because the mean of its divisors is an integer number (46960550).

Almost surely, 2^664155063 is an apocalyptic number.

664155063 is a deficient number, since it is larger than the sum of its proper divisors (462898137).

664155063 is a wasteful number, since it uses less digits than its factorization.

664155063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516079 (or 516076 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 664155063 is about 25771.2060835344. The cubic root of 664155063 is about 872.4820402266.

The spelling of 664155063 in words is "six hundred sixty-four million, one hundred fifty-five thousand, sixty-three".