671022557 has 2 divisors, whose sum is σ = 671022558. Its totient is φ = 671022556.

The previous prime is 671022481. The next prime is 671022577. The reversal of 671022557 is 755220176.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480968761 + 190053796 = 21931^2 + 13786^2 .

It is a cyclic number.

It is not a de Polignac number, because 671022557 - 2¹⁴ = 671006173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671022577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335511278 + 335511279.

It is an arithmetic number, because the mean of its divisors is an integer number (335511279).

Almost surely, 2^671022557 is an apocalyptic number.

It is an amenable number.

671022557 is a deficient number, since it is larger than the sum of its proper divisors (1).

671022557 is an equidigital number, since it uses as much as digits as its factorization.

671022557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 671022557 is about 25904.1030919814. The cubic root of 671022557 is about 875.4789462825.

The spelling of 671022557 in words is "six hundred seventy-one million, twenty-two thousand, five hundred fifty-seven".