66554456 has 32 divisors (see below), whose sum is σ = 137881440. Its totient is φ = 29956608.

The previous prime is 66554447. The next prime is 66554471. The reversal of 66554456 is 65445566.

It is a super-2 number, since 2×66554456² = 8858991226911872, 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, 7511 + ... + 13766.

It is an arithmetic number, because the mean of its divisors is an integer number (4308795).

Almost surely, 2^66554456 is an apocalyptic number.

It is an amenable number.

66554456 is an abundant number, since it is smaller than the sum of its proper divisors (71326984).

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

66554456 is a wasteful number, since it uses less digits than its factorization.

66554456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21323 (or 21319 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The square root of 66554456 is about 8158.0914434689. The cubic root of 66554456 is about 405.2525093011.

It can be divided in two parts, 6655 and 4456, that added together give a palindrome (11111).

The spelling of 66554456 in words is "sixty-six million, five hundred fifty-four thousand, four hundred fifty-six".