1626661320 has 64 divisors (see below), whose sum is σ = 5167048320. Its totient is φ = 408259584.

The previous prime is 1626661279. The next prime is 1626661327. The reversal of 1626661320 is 231666261.

It is not an unprimeable number, because it can be changed into a prime (1626661327) 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, 396652 + ... + 400731.

It is an arithmetic number, because the mean of its divisors is an integer number (80735130).

Almost surely, 2^1626661320 is an apocalyptic number.

1626661320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1626661320 is an abundant number, since it is smaller than the sum of its proper divisors (3540387000).

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

1626661320 is a wasteful number, since it uses less digits than its factorization.

1626661320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797414 (or 797410 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1626661320 is about 40331.8896160346. The cubic root of 1626661320 is about 1176.0678555413.

The spelling of 1626661320 in words is "one billion, six hundred twenty-six million, six hundred sixty-one thousand, three hundred twenty".