671677045 has 16 divisors (see below), whose sum is σ = 869566320. Its totient is φ = 495120384.

The previous prime is 671676997. The next prime is 671677057. The reversal of 671677045 is 540776176.

It can be written as a sum of positive squares in 8 ways, for example, as 1954404 + 669722641 = 1398^2 + 25879^2 .

It is a cyclic number.

It is not a de Polignac number, because 671677045 - 2¹⁵ = 671644277 is a prime.

It is a super-3 number, since 3×671677045³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 671676992 and 671677010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28551 + ... + 46459.

It is an arithmetic number, because the mean of its divisors is an integer number (54347895).

Almost surely, 2^671677045 is an apocalyptic number.

671677045 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

671677045 is a deficient number, since it is larger than the sum of its proper divisors (197889275).

671677045 is a wasteful number, since it uses less digits than its factorization.

671677045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18504.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 671677045 is about 25916.7329152422. The cubic root of 671677045 is about 875.7634892629.

The spelling of 671677045 in words is "six hundred seventy-one million, six hundred seventy-seven thousand, forty-five".