253440667 has 8 divisors (see below), whose sum is σ = 261857024. Its totient is φ = 245139048.

The previous prime is 253440653. The next prime is 253440679. The reversal of 253440667 is 766044352.

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 253440667 - 2¹⁹ = 252916379 is a prime.

It is a super-3 number, since 3×253440667³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253440617) 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, 24183 + ... + 33040.

It is an arithmetic number, because the mean of its divisors is an integer number (32732128).

Almost surely, 2^253440667 is an apocalyptic number.

253440667 is a deficient number, since it is larger than the sum of its proper divisors (8416357).

253440667 is a wasteful number, since it uses less digits than its factorization.

253440667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57369.

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 253440667 is about 15919.8199424491. The cubic root of 253440667 is about 632.8373466405.

The spelling of 253440667 in words is "two hundred fifty-three million, four hundred forty thousand, six hundred sixty-seven".