1670799509651 has 4 divisors (see below), whose sum is σ = 1673645846712. Its totient is φ = 1667953172592.

The previous prime is 1670799509647. The next prime is 1670799509653. The reversal of 1670799509651 is 1569059970761.

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

It is a cyclic number.

It is not a de Polignac number, because 1670799509651 - 2² = 1670799509647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670799509653) 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, 1423167650 + ... + 1423168823.

It is an arithmetic number, because the mean of its divisors is an integer number (418411461678).

Almost surely, 2^{1670799509651} is an apocalyptic number.

1670799509651 is a deficient number, since it is larger than the sum of its proper divisors (2846337061).

1670799509651 is an equidigital number, since it uses as much as digits as its factorization.

1670799509651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846337060.

The product of its (nonzero) digits is 32148900, while the sum is 65.

The spelling of 1670799509651 in words is "one trillion, six hundred seventy billion, seven hundred ninety-nine million, five hundred nine thousand, six hundred fifty-one".