1670505606578 has 4 divisors (see below), whose sum is σ = 2505758409870. Its totient is φ = 835252803288.

The previous prime is 1670505606557. The next prime is 1670505606599. The reversal of 1670505606578 is 8756065050761.

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

It is an interprime number because it is at equal distance from previous prime (1670505606557) and next prime (1670505606599).

It can be written as a sum of positive squares in only one way, i.e., 918620651809 + 751884954769 = 958447^2 + 867113^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417626401643 + ... + 417626401646.

Almost surely, 2^{1670505606578} is an apocalyptic number.

1670505606578 is a deficient number, since it is larger than the sum of its proper divisors (835252803292).

1670505606578 is an equidigital number, since it uses as much as digits as its factorization.

1670505606578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835252803291.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 1670505606578 in words is "one trillion, six hundred seventy billion, five hundred five million, six hundred six thousand, five hundred seventy-eight".