1667333401 has 4 divisors (see below), whose sum is σ = 1669554304. Its totient is φ = 1665112500.

The previous prime is 1667333389. The next prime is 1667333431. The reversal of 1667333401 is 1043337661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1667333401 - 2¹⁵ = 1667300633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667333431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109325 + ... + 1110826.

It is an arithmetic number, because the mean of its divisors is an integer number (417388576).

Almost surely, 2^1667333401 is an apocalyptic number.

It is an amenable number.

1667333401 is a deficient number, since it is larger than the sum of its proper divisors (2220903).

1667333401 is an equidigital number, since it uses as much as digits as its factorization.

1667333401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220902.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 1667333401 is about 40832.9940244406. The cubic root of 1667333401 is about 1185.7891806116.

The spelling of 1667333401 in words is "one billion, six hundred sixty-seven million, three hundred thirty-three thousand, four hundred one".