664416157 has 16 divisors (see below), whose sum is σ = 704487168. Its totient is φ = 625363200.

The previous prime is 664416139. The next prime is 664416167. The reversal of 664416157 is 751614466.

It is a cyclic number.

It is not a de Polignac number, because 664416157 - 2¹⁹ = 663891869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664416107) 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, 391603 + ... + 393295.

It is an arithmetic number, because the mean of its divisors is an integer number (44030448).

Almost surely, 2^664416157 is an apocalyptic number.

It is an amenable number.

664416157 is a deficient number, since it is larger than the sum of its proper divisors (40071011).

664416157 is a wasteful number, since it uses less digits than its factorization.

664416157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980.

The product of its digits is 120960, while the sum is 40.

The square root of 664416157 is about 25776.2712004665. The cubic root of 664416157 is about 872.5963558907.

It can be divided in two parts, 6644 and 16157, that added together give a square (22801 = 151²).

The spelling of 664416157 in words is "six hundred sixty-four million, four hundred sixteen thousand, one hundred fifty-seven".