1670651671 has 8 divisors (see below), whose sum is σ = 1799789040. Its totient is φ = 1541603712.

The previous prime is 1670651629. The next prime is 1670651677. The reversal of 1670651671 is 1761560761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1670651671 - 2²⁹ = 1133780759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670651677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19356 + ... + 60958.

It is an arithmetic number, because the mean of its divisors is an integer number (224973630).

Almost surely, 2^1670651671 is an apocalyptic number.

1670651671 is a deficient number, since it is larger than the sum of its proper divisors (129137369).

1670651671 is a wasteful number, since it uses less digits than its factorization.

1670651671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44705.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1670651671 is about 40873.6060435093. The cubic root of 1670651671 is about 1186.5752983858.

The spelling of 1670651671 in words is "one billion, six hundred seventy million, six hundred fifty-one thousand, six hundred seventy-one".