66613492 has 24 divisors (see below), whose sum is σ = 128368800. Its totient is φ = 29993760.

The previous prime is 66613471. The next prime is 66613517. The reversal of 66613492 is 29431666.

It is a happy number.

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, 2367 + ... + 11782.

It is an arithmetic number, because the mean of its divisors is an integer number (5348700).

Almost surely, 2^66613492 is an apocalyptic number.

It is an amenable number.

66613492 is a deficient number, since it is larger than the sum of its proper divisors (61755308).

66613492 is a wasteful number, since it uses less digits than its factorization.

66613492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14271 (or 14269 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 66613492 is about 8161.7088896873. The cubic root of 66613492 is about 405.3722980081.

It can be divided in two parts, 6661 and 3492, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 66613492 in words is "sixty-six million, six hundred thirteen thousand, four hundred ninety-two".