1660253634 has 72 divisors (see below), whose sum is σ = 3950586432. Its totient is φ = 503586720.

The previous prime is 1660253633. The next prime is 1660253657. The reversal of 1660253634 is 4363520661.

1660253634 is a `hidden beast` number, since 16 + 6 + 0 + 2 + 5 + 3 + 634 = 666.

It is not an unprimeable number, because it can be changed into a prime (1660253633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 212139 + ... + 219825.

It is an arithmetic number, because the mean of its divisors is an integer number (54869256).

Almost surely, 2^1660253634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660253634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1975293216).

1660253634 is an abundant number, since it is smaller than the sum of its proper divisors (2290332798).

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

1660253634 is a wasteful number, since it uses less digits than its factorization.

1660253634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7792 (or 7776 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 1660253634 is about 40746.2100568875. The cubic root of 1660253634 is about 1184.1084486622.

The spelling of 1660253634 in words is "one billion, six hundred sixty million, two hundred fifty-three thousand, six hundred thirty-four".