1999670061 has 8 divisors (see below), whose sum is σ = 2668635360. Its totient is φ = 1331909072.

The previous prime is 1999670059. The next prime is 1999670087. The reversal of 1999670061 is 1600769991.

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 1999670061 - 2¹ = 1999670059 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999670011) 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, 297195 + ... + 303848.

It is an arithmetic number, because the mean of its divisors is an integer number (333579420).

Almost surely, 2^1999670061 is an apocalyptic number.

It is an amenable number.

1999670061 is a deficient number, since it is larger than the sum of its proper divisors (668965299).

1999670061 is a wasteful number, since it uses less digits than its factorization.

1999670061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602155.

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 1999670061 is about 44717.6705676850. The cubic root of 1999670061 is about 1259.8517632361.

The spelling of 1999670061 in words is "one billion, nine hundred ninety-nine million, six hundred seventy thousand, sixty-one".