66900642 has 8 divisors (see below), whose sum is σ = 133801296. Its totient is φ = 22300212.

The previous prime is 66900619. The next prime is 66900649. The reversal of 66900642 is 24600966.

It is a sphenic number, since it is the product of 3 distinct primes.

66900642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66900649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5575048 + ... + 5575059.

It is an arithmetic number, because the mean of its divisors is an integer number (16725162).

Almost surely, 2^66900642 is an apocalyptic number.

66900642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66900642 is a wasteful number, since it uses less digits than its factorization.

66900642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11150112.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 66900642 is about 8179.2812642677. The cubic root of 66900642 is about 405.9539409194.

The spelling of 66900642 in words is "sixty-six million, nine hundred thousand, six hundred forty-two".