1660061040 has 80 divisors (see below), whose sum is σ = 5614033536. Its totient is φ = 402438400.

The previous prime is 1660060973. The next prime is 1660061047. The reversal of 1660061040 is 401600661.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1660061040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660061047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311766 + ... + 317045.

Almost surely, 2^1660061040 is an apocalyptic number.

1660061040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660061040 is an abundant number, since it is smaller than the sum of its proper divisors (3953972496).

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

1660061040 is a wasteful number, since it uses less digits than its factorization.

1660061040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628838 (or 628832 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1660061040 is about 40743.8466519792. The cubic root of 1660061040 is about 1184.0626602764.

The spelling of 1660061040 in words is "one billion, six hundred sixty million, sixty-one thousand, forty".