666020662 has 8 divisors (see below), whose sum is σ = 1057797576. Its totient is φ = 313421472.

The previous prime is 666020653. The next prime is 666020671. The reversal of 666020662 is 266020666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666020653) and next prime (666020671).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 19588843 = 666020662 / (6 + 6 + 6 + 0 + 2 + 0 + 6 + 6 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9794388 + ... + 9794455.

It is an arithmetic number, because the mean of its divisors is an integer number (132224697).

Almost surely, 2^666020662 is an apocalyptic number.

666020662 is a deficient number, since it is larger than the sum of its proper divisors (391776914).

666020662 is a wasteful number, since it uses less digits than its factorization.

666020662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19588862.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 666020662 is about 25807.3761161417. The cubic root of 666020662 is about 873.2982050176.

The spelling of 666020662 in words is "six hundred sixty-six million, twenty thousand, six hundred sixty-two".