666700401 has 8 divisors (see below), whose sum is σ = 919586880. Its totient is φ = 429140432.

The previous prime is 666700399. The next prime is 666700403. The reversal of 666700401 is 104007666.

It is an interprime number because it is at equal distance from previous prime (666700399) and next prime (666700403).

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 666700401 - 2¹ = 666700399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666700403) 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, 3831525 + ... + 3831698.

It is an arithmetic number, because the mean of its divisors is an integer number (114948360).

Almost surely, 2^666700401 is an apocalyptic number.

It is an amenable number.

666700401 is a deficient number, since it is larger than the sum of its proper divisors (252886479).

666700401 is a wasteful number, since it uses less digits than its factorization.

666700401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7663255.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 666700401 is about 25820.5422290083. The cubic root of 666700401 is about 873.5951993151.

The spelling of 666700401 in words is "six hundred sixty-six million, seven hundred thousand, four hundred one".