1665607080 has 64 divisors (see below), whose sum is σ = 5000875200. Its totient is φ = 443801600.

The previous prime is 1665607039. The next prime is 1665607087. The reversal of 1665607080 is 807065661.

It is a super-2 number, since 2×1665607080² = 5548493889892252800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1665607087) 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, 164155 + ... + 174005.

It is an arithmetic number, because the mean of its divisors is an integer number (78138675).

Almost surely, 2^1665607080 is an apocalyptic number.

1665607080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665607080 is an abundant number, since it is smaller than the sum of its proper divisors (3335268120).

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

1665607080 is a wasteful number, since it uses less digits than its factorization.

1665607080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11274 (or 11270 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1665607080 is about 40811.8497497969. The cubic root of 1665607080 is about 1185.3797924511.

The spelling of 1665607080 in words is "one billion, six hundred sixty-five million, six hundred seven thousand, eighty".