664545001 has 4 divisors (see below), whose sum is σ = 665579152. Its totient is φ = 663510852.

The previous prime is 664544999. The next prime is 664545017. The reversal of 664545001 is 100545466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664545001 - 2¹ = 664544999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664545071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516111 + ... + 517396.

It is an arithmetic number, because the mean of its divisors is an integer number (166394788).

Almost surely, 2^664545001 is an apocalyptic number.

It is an amenable number.

664545001 is a deficient number, since it is larger than the sum of its proper divisors (1034151).

664545001 is a wasteful number, since it uses less digits than its factorization.

664545001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034150.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 664545001 is about 25778.7703546930. The cubic root of 664545001 is about 872.6527570569.

The spelling of 664545001 in words is "six hundred sixty-four million, five hundred forty-five thousand, one".