666662043 has 8 divisors (see below), whose sum is σ = 889002000. Its totient is φ = 444381728.

The previous prime is 666662039. The next prime is 666662047. The reversal of 666662043 is 340266666.

It is an interprime number because it is at equal distance from previous prime (666662039) and next prime (666662047).

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

It is a cyclic number.

It is not a de Polignac number, because 666662043 - 2² = 666662039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666661992 and 666662010.

It is not an unprimeable number, because it can be changed into a prime (666662047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36433 + ... + 51581.

It is an arithmetic number, because the mean of its divisors is an integer number (111125250).

Almost surely, 2^666662043 is an apocalyptic number.

666662043 is a deficient number, since it is larger than the sum of its proper divisors (222339957).

666662043 is a wasteful number, since it uses less digits than its factorization.

666662043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29821.

The product of its (nonzero) digits is 186624, while the sum is 39.

The square root of 666662043 is about 25819.7994376409. The cubic root of 666662043 is about 873.5784451592.

The spelling of 666662043 in words is "six hundred sixty-six million, six hundred sixty-two thousand, forty-three".