3551431660 has 48 divisors (see below), whose sum is σ = 8526921984. Its totient is φ = 1217135808.

The previous prime is 3551431613. The next prime is 3551431691. The reversal of 3551431660 is 661341553.

It is a super-2 number, since 2×3551431660² = 25225333671300711200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549367 + ... + 555793.

It is an arithmetic number, because the mean of its divisors is an integer number (177644208).

Almost surely, 2^3551431660 is an apocalyptic number.

It is an amenable number.

3551431660 is an abundant number, since it is smaller than the sum of its proper divisors (4975490324).

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

3551431660 is a wasteful number, since it uses less digits than its factorization.

3551431660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10390 (or 10388 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 3551431660 is about 59593.8894518557. The cubic root of 3551431660 is about 1525.6953432076.

The spelling of 3551431660 in words is "three billion, five hundred fifty-one million, four hundred thirty-one thousand, six hundred sixty".