664078177 has 16 divisors (see below), whose sum is σ = 800967040. Its totient is φ = 537850368.

The previous prime is 664078133. The next prime is 664078201. The reversal of 664078177 is 771870466.

It is a cyclic number.

It is not a de Polignac number, because 664078177 - 2⁷ = 664078049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664078117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46513 + ... + 59089.

It is an arithmetic number, because the mean of its divisors is an integer number (50060440).

Almost surely, 2^664078177 is an apocalyptic number.

It is an amenable number.

664078177 is a deficient number, since it is larger than the sum of its proper divisors (136888863).

664078177 is a wasteful number, since it uses less digits than its factorization.

664078177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13000.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 664078177 is about 25769.7143367947. The cubic root of 664078177 is about 872.4483712605.

The spelling of 664078177 in words is "six hundred sixty-four million, seventy-eight thousand, one hundred seventy-seven".