670819465 has 4 divisors (see below), whose sum is σ = 804983364. Its totient is φ = 536655568.

The previous prime is 670819459. The next prime is 670819469. The reversal of 670819465 is 564918076.

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 257795136 + 413024329 = 16056^2 + 20323^2 .

It is a cyclic number.

It is not a de Polignac number, because 670819465 - 2¹⁷ = 670688393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670819469) 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, 67081942 + ... + 67081951.

It is an arithmetic number, because the mean of its divisors is an integer number (201245841).

Almost surely, 2^670819465 is an apocalyptic number.

It is an amenable number.

670819465 is a deficient number, since it is larger than the sum of its proper divisors (134163899).

670819465 is a wasteful number, since it uses less digits than its factorization.

670819465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134163898.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 670819465 is about 25900.1827213632. The cubic root of 670819465 is about 875.3906130815.

The spelling of 670819465 in words is "six hundred seventy million, eight hundred nineteen thousand, four hundred sixty-five".