664838467402 has 8 divisors (see below), whose sum is σ = 997268242212. Its totient is φ = 332415720000.

The previous prime is 664838467373. The next prime is 664838467439. The reversal of 664838467402 is 204764838466.

It can be written as a sum of positive squares in 2 ways, for example, as 389686814001 + 275151653401 = 624249^2 + 524549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513599 + ... + 1902802.

Almost surely, 2^664838467402 is an apocalyptic number.

664838467402 is a deficient number, since it is larger than the sum of its proper divisors (332429774810).

664838467402 is a wasteful number, since it uses less digits than its factorization.

664838467402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513704.

The product of its (nonzero) digits is 37158912, while the sum is 58.

The spelling of 664838467402 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, four hundred sixty-seven thousand, four hundred two".