66616546 has 32 divisors (see below), whose sum is σ = 109612800. Its totient is φ = 30255120.

The previous prime is 66616541. The next prime is 66616553. The reversal of 66616546 is 64561666.

It is a junction number, because it is equal to n+sod(n) for n = 66616499 and 66616508.

It is not an unprimeable number, because it can be changed into a prime (66616541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96061 + ... + 96751.

It is an arithmetic number, because the mean of its divisors is an integer number (3425400).

Almost surely, 2^66616546 is an apocalyptic number.

66616546 is a deficient number, since it is larger than the sum of its proper divisors (42996254).

66616546 is a wasteful number, since it uses less digits than its factorization.

66616546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814.

The product of its digits is 155520, while the sum is 40.

The square root of 66616546 is about 8161.8959807143. The cubic root of 66616546 is about 405.3784928897.

The spelling of 66616546 in words is "sixty-six million, six hundred sixteen thousand, five hundred forty-six".