668881035 has 48 divisors (see below), whose sum is σ = 1223782560. Its totient is φ = 337029120.

The previous prime is 668881019. The next prime is 668881049. The reversal of 668881035 is 530188866.

It is not a de Polignac number, because 668881035 - 2⁴ = 668881019 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 393307 + ... + 395003.

It is an arithmetic number, because the mean of its divisors is an integer number (25495470).

Almost surely, 2^668881035 is an apocalyptic number.

668881035 is a deficient number, since it is larger than the sum of its proper divisors (554901525).

668881035 is a wasteful number, since it uses less digits than its factorization.

668881035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 668881035 is about 25862.7344841956. The cubic root of 668881035 is about 874.5466102824.

The spelling of 668881035 in words is "six hundred sixty-eight million, eight hundred eighty-one thousand, thirty-five".