664507935 has 64 divisors (see below), whose sum is σ = 1453992960. Its totient is φ = 280402560.

The previous prime is 664507933. The next prime is 664507937. The reversal of 664507935 is 539705466.

It is an interprime number because it is at equal distance from previous prime (664507933) and next prime (664507937).

It is not a de Polignac number, because 664507935 - 2¹ = 664507933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664507933) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14761 + ... + 39330.

It is an arithmetic number, because the mean of its divisors is an integer number (22718640).

Almost surely, 2^664507935 is an apocalyptic number.

664507935 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664507935 is an abundant number, since it is smaller than the sum of its proper divisors (789485025).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664507935 is a wasteful number, since it uses less digits than its factorization.

664507935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54125 (or 54119 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The square root of 664507935 is about 25778.0514197641. The cubic root of 664507935 is about 872.6365322472.

The spelling of 664507935 in words is "six hundred sixty-four million, five hundred seven thousand, nine hundred thirty-five".