1670005251 has 24 divisors (see below), whose sum is σ = 2563614144. Its totient is φ = 1043953920.

The previous prime is 1670005243. The next prime is 1670005283. The reversal of 1670005251 is 1525000761.

It is not a de Polignac number, because 1670005251 - 2³ = 1670005243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1670005201) 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 in 23 ways as a sum of consecutive naturals, for example, 21325 + ... + 61601.

It is an arithmetic number, because the mean of its divisors is an integer number (106817256).

Almost surely, 2^1670005251 is an apocalyptic number.

1670005251 is a deficient number, since it is larger than the sum of its proper divisors (893608893).

1670005251 is a wasteful number, since it uses less digits than its factorization.

1670005251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40571 (or 40568 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1670005251 is about 40865.6977304927. The cubic root of 1670005251 is about 1186.4222393596.

The spelling of 1670005251 in words is "one billion, six hundred seventy million, five thousand, two hundred fifty-one".