670472881 has 4 divisors (see below), whose sum is σ = 722047732. Its totient is φ = 618898032.

The previous prime is 670472879. The next prime is 670472909. The reversal of 670472881 is 188274076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 221414400 + 449058481 = 14880^2 + 21191^2 .

It is a cyclic number.

It is not a de Polignac number, because 670472881 - 2¹ = 670472879 is a prime.

It is a super-2 number, since 2×670472881² = 899067768312880322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670472281) 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, 25787406 + ... + 25787431.

It is an arithmetic number, because the mean of its divisors is an integer number (180511933).

Almost surely, 2^670472881 is an apocalyptic number.

It is an amenable number.

670472881 is a deficient number, since it is larger than the sum of its proper divisors (51574851).

670472881 is a wasteful number, since it uses less digits than its factorization.

670472881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51574850.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 670472881 is about 25893.4910933230. The cubic root of 670472881 is about 875.2398280284.

The spelling of 670472881 in words is "six hundred seventy million, four hundred seventy-two thousand, eight hundred eighty-one".