662161556 has 24 divisors (see below), whose sum is σ = 1325815680. Its totient is φ = 283463712.

The previous prime is 662161547. The next prime is 662161561. The reversal of 662161556 is 655161266.

It is a super-2 number, since 2×662161556² = 876915852488682272, which contains 22 as substring.

It is a congruent 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, 12866 + ... + 38598.

It is an arithmetic number, because the mean of its divisors is an integer number (55242320).

Almost surely, 2^662161556 is an apocalyptic number.

It is a pronic number, being equal to 25732×25733.

It is an amenable number.

662161556 is an abundant number, since it is smaller than the sum of its proper divisors (663654124).

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

662161556 is a wasteful number, since it uses less digits than its factorization.

662161556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26663 (or 26661 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 662161556 is about 25732.4999951423. The cubic root of 662161556 is about 871.6082271330.

The spelling of 662161556 in words is "six hundred sixty-two million, one hundred sixty-one thousand, five hundred fifty-six".