1660439952 has 40 divisors (see below), whose sum is σ = 4766078880. Its totient is φ = 553479840.

The previous prime is 1660439951. The next prime is 1660440013. The reversal of 1660439952 is 2599340661.

1660439952 is a `hidden beast` number, since 1 + 6 + 604 + 39 + 9 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1660439898 and 1660439907.

It is not an unprimeable number, because it can be changed into a prime (1660439951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1921374 + ... + 1922237.

It is an arithmetic number, because the mean of its divisors is an integer number (119151972).

Almost surely, 2^1660439952 is an apocalyptic number.

1660439952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1660439952 is an abundant number, since it is smaller than the sum of its proper divisors (3105638928).

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

1660439952 is a wasteful number, since it uses less digits than its factorization.

1660439952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843628 (or 3843616 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 1660439952 is about 40748.4963158151. The cubic root of 1660439952 is about 1184.1527415865.

The spelling of 1660439952 in words is "one billion, six hundred sixty million, four hundred thirty-nine thousand, nine hundred fifty-two".