1642002660 has 72 divisors (see below), whose sum is σ = 5197308480. Its totient is φ = 418828608.

The previous prime is 1642002643. The next prime is 1642002671. The reversal of 1642002660 is 662002461.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 194170 + ... + 202449.

It is an arithmetic number, because the mean of its divisors is an integer number (72184840).

Almost surely, 2^1642002660 is an apocalyptic number.

1642002660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642002660 is an abundant number, since it is smaller than the sum of its proper divisors (3555305820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642002660 is a wasteful number, since it uses less digits than its factorization.

1642002660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396657 (or 396652 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1642002660 is about 40521.6320006981. The cubic root of 1642002660 is about 1179.7535298690.

The spelling of 1642002660 in words is "one billion, six hundred forty-two million, two thousand, six hundred sixty".