66610896 has 160 divisors (see below), whose sum is σ = 204736896. Its totient is φ = 18432000.

The previous prime is 66610889. The next prime is 66610919. The reversal of 66610896 is 69801666.

It is a super-2 number, since 2×66610896² = 8874022931845632, 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 31 ways as a sum of consecutive naturals, for example, 367926 + ... + 368106.

Almost surely, 2^66610896 is an apocalyptic number.

66610896 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66610896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102368448).

66610896 is an abundant number, since it is smaller than the sum of its proper divisors (138126000).

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

66610896 is a wasteful number, since it uses less digits than its factorization.

66610896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 66610896 is about 8161.5498528159. The cubic root of 66610896 is about 405.3670320071.

The spelling of 66610896 in words is "sixty-six million, six hundred ten thousand, eight hundred ninety-six".