66554642 has 48 divisors (see below), whose sum is σ = 128094048. Its totient is φ = 25643520.

The previous prime is 66554639. The next prime is 66554671. The reversal of 66554642 is 24645566.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66554596 and 66554605.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115058 + ... + 115634.

It is an arithmetic number, because the mean of its divisors is an integer number (2668626).

Almost surely, 2^66554642 is an apocalyptic number.

66554642 is a deficient number, since it is larger than the sum of its proper divisors (61539406).

66554642 is a wasteful number, since it uses less digits than its factorization.

66554642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 704 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 66554642 is about 8158.1028431860. The cubic root of 66554642 is about 405.2528868210.

The spelling of 66554642 in words is "sixty-six million, five hundred fifty-four thousand, six hundred forty-two".