1670652221 has 8 divisors (see below), whose sum is σ = 1913572800. Its totient is φ = 1428795648.

The previous prime is 1670652209. The next prime is 1670652239. The reversal of 1670652221 is 1222560761.

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

It is a de Polignac number, because none of the positive numbers 2^k-1670652221 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 (1670652241) 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, 262631 + ... + 268916.

It is an arithmetic number, because the mean of its divisors is an integer number (239196600).

Almost surely, 2^1670652221 is an apocalyptic number.

It is an amenable number.

1670652221 is a deficient number, since it is larger than the sum of its proper divisors (242920579).

1670652221 is an equidigital number, since it uses as much as digits as its factorization.

1670652221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532003.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1670652221 is about 40873.6127715669. The cubic root of 1670652221 is about 1186.5754285977.

The spelling of 1670652221 in words is "one billion, six hundred seventy million, six hundred fifty-two thousand, two hundred twenty-one".