668071835 has 16 divisors (see below), whose sum is σ = 827541792. Its totient is φ = 517420800.

The previous prime is 668071801. The next prime is 668071843. The reversal of 668071835 is 538170866.

It is not a de Polignac number, because 668071835 - 2¹² = 668067739 is a prime.

It is a Duffinian 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, 14417 + ... + 39293.

It is an arithmetic number, because the mean of its divisors is an integer number (51721362).

Almost surely, 2^668071835 is an apocalyptic number.

668071835 is a deficient number, since it is larger than the sum of its proper divisors (159469957).

668071835 is a wasteful number, since it uses less digits than its factorization.

668071835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25054.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 668071835 is about 25847.0856190790. The cubic root of 668071835 is about 874.1937978226.

The spelling of 668071835 in words is "six hundred sixty-eight million, seventy-one thousand, eight hundred thirty-five".