668191083 has 16 divisors (see below), whose sum is σ = 1018676736. Its totient is φ = 381643200.

The previous prime is 668191049. The next prime is 668191091. The reversal of 668191083 is 380191866.

It is not a de Polignac number, because 668191083 - 2¹⁰ = 668190059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668191033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47335 + ... + 59807.

It is an arithmetic number, because the mean of its divisors is an integer number (63667296).

Almost surely, 2^668191083 is an apocalyptic number.

668191083 is a deficient number, since it is larger than the sum of its proper divisors (350485653).

668191083 is a wasteful number, since it uses less digits than its factorization.

668191083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15034.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 668191083 is about 25849.3923139404. The cubic root of 668191083 is about 874.2458080281.

The spelling of 668191083 in words is "six hundred sixty-eight million, one hundred ninety-one thousand, eighty-three".