1664650672 has 10 divisors (see below), whose sum is σ = 3225260708. Its totient is φ = 832325328.

The previous prime is 1664650661. The next prime is 1664650697. The reversal of 1664650672 is 2760564661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52020318 + ... + 52020349.

Almost surely, 2^1664650672 is an apocalyptic number.

It is an amenable number.

1664650672 is a deficient number, since it is larger than the sum of its proper divisors (1560610036).

1664650672 is a wasteful number, since it uses less digits than its factorization.

1664650672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104040675 (or 104040669 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 1664650672 is about 40800.1307841041. The cubic root of 1664650672 is about 1185.1528634243.

The spelling of 1664650672 in words is "one billion, six hundred sixty-four million, six hundred fifty thousand, six hundred seventy-two".