1670645467 has 4 divisors (see below), whose sum is σ = 1670727640. Its totient is φ = 1670563296.

The previous prime is 1670645443. The next prime is 1670645479. The reversal of 1670645467 is 7645460761.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7645460761 = 7457 ⋅1025273.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1670645467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670645567) 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, 14284 + ... + 59542.

It is an arithmetic number, because the mean of its divisors is an integer number (417681910).

Almost surely, 2^1670645467 is an apocalyptic number.

1670645467 is a deficient number, since it is larger than the sum of its proper divisors (82173).

1670645467 is an equidigital number, since it uses as much as digits as its factorization.

1670645467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82172.

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 1670645467 is about 40873.5301509424. The cubic root of 1670645467 is about 1186.5738295932.

The spelling of 1670645467 in words is "one billion, six hundred seventy million, six hundred forty-five thousand, four hundred sixty-seven".