66613662 has 24 divisors (see below), whose sum is σ = 144659424. Its totient is φ = 22153824.

The previous prime is 66613649. The next prime is 66613693. The reversal of 66613662 is 26631666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4338 + ... + 12330.

It is an arithmetic number, because the mean of its divisors is an integer number (6027476).

Almost surely, 2^66613662 is an apocalyptic number.

66613662 is an abundant number, since it is smaller than the sum of its proper divisors (78045762).

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

66613662 is a wasteful number, since it uses less digits than its factorization.

66613662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8464 (or 8461 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 66613662 is about 8161.7193041662. The cubic root of 66613662 is about 405.3726428493.

The spelling of 66613662 in words is "sixty-six million, six hundred thirteen thousand, six hundred sixty-two".