664154357 has 2 divisors, whose sum is σ = 664154358. Its totient is φ = 664154356.

The previous prime is 664154339. The next prime is 664154369. The reversal of 664154357 is 753451466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385965316 + 278189041 = 19646^2 + 16679^2 .

It is a cyclic number.

It is not a de Polignac number, because 664154357 - 2²⁴ = 647377141 is a prime.

It is a super-2 number, since 2×664154357² = 882202019844166898, which contains 22 as substring.

It is equal to p_34490858 and since 664154357 and 34490858 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664154857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332077178 + 332077179.

It is an arithmetic number, because the mean of its divisors is an integer number (332077179).

Almost surely, 2^664154357 is an apocalyptic number.

It is an amenable number.

664154357 is a deficient number, since it is larger than the sum of its proper divisors (1).

664154357 is an equidigital number, since it uses as much as digits as its factorization.

664154357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 41.

The square root of 664154357 is about 25771.1923860733. The cubic root of 664154357 is about 872.4817310756.

The spelling of 664154357 in words is "six hundred sixty-four million, one hundred fifty-four thousand, three hundred fifty-seven".