1669247620 has 24 divisors (see below), whose sum is σ = 3528641088. Its totient is φ = 663276000.

The previous prime is 1669247617. The next prime is 1669247653. The reversal of 1669247620 is 267429661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273346 + ... + 279385.

It is an arithmetic number, because the mean of its divisors is an integer number (147026712).

Almost surely, 2^1669247620 is an apocalyptic number.

1669247620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1669247620 is an abundant number, since it is smaller than the sum of its proper divisors (1859393468).

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

1669247620 is a wasteful number, since it uses less digits than its factorization.

1669247620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552891 (or 552889 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 1669247620 is about 40856.4269118091. The cubic root of 1669247620 is about 1186.2427975622.

The spelling of 1669247620 in words is "one billion, six hundred sixty-nine million, two hundred forty-seven thousand, six hundred twenty".