1670390564 has 6 divisors (see below), whose sum is σ = 2923183494. Its totient is φ = 835195280.

The previous prime is 1670390551. The next prime is 1670390569. The reversal of 1670390564 is 4650930761.

It can be written as a sum of positive squares in only one way, i.e., 1236084964 + 434305600 = 35158^2 + 20840^2 .

It is not an unprimeable number, because it can be changed into a prime (1670390569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208798817 + ... + 208798824.

It is an arithmetic number, because the mean of its divisors is an integer number (487197249).

Almost surely, 2^1670390564 is an apocalyptic number.

It is an amenable number.

1670390564 is a deficient number, since it is larger than the sum of its proper divisors (1252792930).

1670390564 is a wasteful number, since it uses less digits than its factorization.

1670390564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417597645 (or 417597643 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 1670390564 is about 40870.4118403522. The cubic root of 1670390564 is about 1186.5134783459.

The spelling of 1670390564 in words is "one billion, six hundred seventy million, three hundred ninety thousand, five hundred sixty-four".