667126401 has 8 divisors (see below), whose sum is σ = 889658400. Its totient is φ = 444672672.

The previous prime is 667126379. The next prime is 667126403. The reversal of 667126401 is 104621766.

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

It is not a de Polignac number, because 667126401 - 2¹⁸ = 666864257 is a prime.

It is a super-2 number, since 2×667126401² = 890115269822425602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (667126403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4581 + ... + 36813.

It is an arithmetic number, because the mean of its divisors is an integer number (111207300).

Almost surely, 2^667126401 is an apocalyptic number.

It is an amenable number.

667126401 is a deficient number, since it is larger than the sum of its proper divisors (222531999).

667126401 is a wasteful number, since it uses less digits than its factorization.

667126401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39135.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 667126401 is about 25828.7901574967. The cubic root of 667126401 is about 873.7812260612.

The spelling of 667126401 in words is "six hundred sixty-seven million, one hundred twenty-six thousand, four hundred one".