1642660834 has 8 divisors (see below), whose sum is σ = 2469554640. Its totient is φ = 819475956.

The previous prime is 1642660813. The next prime is 1642660861. The reversal of 1642660834 is 4380662461.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926124 + ... + 927895.

It is an arithmetic number, because the mean of its divisors is an integer number (308694330).

Almost surely, 2^1642660834 is an apocalyptic number.

1642660834 is a deficient number, since it is larger than the sum of its proper divisors (826893806).

1642660834 is a wasteful number, since it uses less digits than its factorization.

1642660834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854464.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 1642660834 is about 40529.7524542157. The cubic root of 1642660834 is about 1179.9111380943.

The spelling of 1642660834 in words is "one billion, six hundred forty-two million, six hundred sixty thousand, eight hundred thirty-four".