66899954 has 8 divisors (see below), whose sum is σ = 109472688. Its totient is φ = 30409060.

The previous prime is 66899951. The next prime is 66899983. The reversal of 66899954 is 45999866.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66899954.

It is not an unprimeable number, because it can be changed into a prime (66899951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520432 + ... + 1520475.

It is an arithmetic number, because the mean of its divisors is an integer number (13684086).

Almost surely, 2^66899954 is an apocalyptic number.

66899954 is a deficient number, since it is larger than the sum of its proper divisors (42572734).

66899954 is a wasteful number, since it uses less digits than its factorization.

66899954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040920.

The product of its digits is 4199040, while the sum is 56.

The square root of 66899954 is about 8179.2392066744. The cubic root of 66899954 is about 405.9525493171.

The spelling of 66899954 in words is "sixty-six million, eight hundred ninety-nine thousand, nine hundred fifty-four".