1660047402 has 128 divisors (see below), whose sum is σ = 3888622080. Its totient is φ = 468357120.

The previous prime is 1660047391. The next prime is 1660047407. The reversal of 1660047402 is 2047400661.

It is a self number, because there is not a number n which added to its sum of digits gives 1660047402.

It is not an unprimeable number, because it can be changed into a prime (1660047407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5907502 + ... + 5907782.

It is an arithmetic number, because the mean of its divisors is an integer number (30379860).

Almost surely, 2^1660047402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660047402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944311040).

1660047402 is an abundant number, since it is smaller than the sum of its proper divisors (2228574678).

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

1660047402 is a wasteful number, since it uses less digits than its factorization.

1660047402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1660047402 is about 40743.6792889400. The cubic root of 1660047402 is about 1184.0594177670.

The spelling of 1660047402 in words is "one billion, six hundred sixty million, forty-seven thousand, four hundred two".