66490954 has 8 divisors (see below), whose sum is σ = 99781920. Its totient is φ = 33230316.

The previous prime is 66490951. The next prime is 66490969. The reversal of 66490954 is 45909466.

It is a happy number.

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 66490954.

It is not an unprimeable number, because it can be changed into a prime (66490951) 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, 934 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (12472740).

Almost surely, 2^66490954 is an apocalyptic number.

66490954 is a deficient number, since it is larger than the sum of its proper divisors (33290966).

66490954 is a wasteful number, since it uses less digits than its factorization.

66490954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15164.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 66490954 is about 8154.1985504401. The cubic root of 66490954 is about 405.1235796225.

The spelling of 66490954 in words is "sixty-six million, four hundred ninety thousand, nine hundred fifty-four".