668415371 has 16 divisors (see below), whose sum is σ = 731747520. Its totient is φ = 606829440.

The previous prime is 668415361. The next prime is 668415373. The reversal of 668415371 is 173514866.

It is a cyclic number.

It is not a de Polignac number, because 668415371 - 2¹⁴ = 668398987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668415373) 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, 602165 + ... + 603273.

It is an arithmetic number, because the mean of its divisors is an integer number (45734220).

Almost surely, 2^668415371 is an apocalyptic number.

668415371 is a deficient number, since it is larger than the sum of its proper divisors (63332149).

668415371 is a wasteful number, since it uses less digits than its factorization.

668415371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846.

The product of its digits is 120960, while the sum is 41.

The square root of 668415371 is about 25853.7303111176. The cubic root of 668415371 is about 874.3436148349.

The spelling of 668415371 in words is "six hundred sixty-eight million, four hundred fifteen thousand, three hundred seventy-one".