664603534 has 32 divisors (see below), whose sum is σ = 1161141696. Its totient is φ = 279417600.

The previous prime is 664603519. The next prime is 664603549. The reversal of 664603534 is 435306466.

It is an interprime number because it is at equal distance from previous prime (664603519) and next prime (664603549).

It is a junction number, because it is equal to n+sod(n) for n = 664603493 and 664603502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199684 + ... + 202984.

It is an arithmetic number, because the mean of its divisors is an integer number (36285678).

Almost surely, 2^664603534 is an apocalyptic number.

664603534 is a deficient number, since it is larger than the sum of its proper divisors (496538162).

664603534 is a wasteful number, since it uses less digits than its factorization.

664603534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580.

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 664603534 is about 25779.9056243424. The cubic root of 664603534 is about 872.6783773355.

The spelling of 664603534 in words is "six hundred sixty-four million, six hundred three thousand, five hundred thirty-four".