671406553 has 8 divisors (see below), whose sum is σ = 707261120. Its totient is φ = 635603760.

The previous prime is 671406539. The next prime is 671406559. The reversal of 671406553 is 355604176.

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 671406553 - 2¹³ = 671398361 is a prime.

It is a super-2 number, since 2×671406553² = 901573518822683618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671406559) 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, 15283 + ... + 39703.

It is an arithmetic number, because the mean of its divisors is an integer number (88407640).

Almost surely, 2^671406553 is an apocalyptic number.

It is an amenable number.

671406553 is a deficient number, since it is larger than the sum of its proper divisors (35854567).

671406553 is a wasteful number, since it uses less digits than its factorization.

671406553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25887.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 671406553 is about 25911.5139079136. The cubic root of 671406553 is about 875.6459134996.

The spelling of 671406553 in words is "six hundred seventy-one million, four hundred six thousand, five hundred fifty-three".