1669474980 has 36 divisors (see below), whose sum is σ = 5064074652. Its totient is φ = 445193280.

The previous prime is 1669474973. The next prime is 1669474997. The reversal of 1669474980 is 894749661.

1669474980 is a `hidden beast` number, since 1 + 66 + 94 + 7 + 498 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 465523776 + 1203951204 = 21576^2 + 34698^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4637251 + ... + 4637610.

Almost surely, 2^1669474980 is an apocalyptic number.

1669474980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1669474980 is an abundant number, since it is smaller than the sum of its proper divisors (3394599672).

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

1669474980 is a wasteful number, since it uses less digits than its factorization.

1669474980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9274876 (or 9274871 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 1669474980 is about 40859.2092434496. The cubic root of 1669474980 is about 1186.2966525475.

The spelling of 1669474980 in words is "one billion, six hundred sixty-nine million, four hundred seventy-four thousand, nine hundred eighty".