668071701 has 24 divisors (see below), whose sum is σ = 1054164384. Its totient is φ = 404336160.

The previous prime is 668071697. The next prime is 668071709. The reversal of 668071701 is 107170866.

It is a happy number.

It is not a de Polignac number, because 668071701 - 2² = 668071697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668071709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74670 + ... + 83136.

It is an arithmetic number, because the mean of its divisors is an integer number (43923516).

Almost surely, 2^668071701 is an apocalyptic number.

It is an amenable number.

668071701 is a deficient number, since it is larger than the sum of its proper divisors (386092683).

668071701 is a wasteful number, since it uses less digits than its factorization.

668071701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9281 (or 9278 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 668071701 is about 25847.0830269104. The cubic root of 668071701 is about 874.1937393748.

The spelling of 668071701 in words is "six hundred sixty-eight million, seventy-one thousand, seven hundred one".