66900954 has 8 divisors (see below), whose sum is σ = 133801920. Its totient is φ = 22300316.

The previous prime is 66900949. The next prime is 66900959. The reversal of 66900954 is 45900966.

It is an interprime number because it is at equal distance from previous prime (66900949) and next prime (66900959).

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

66900954 is an admirable number.

It is a super-2 number, since 2×66900954² = 8951475292220232, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66900959) 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, 5575074 + ... + 5575085.

It is an arithmetic number, because the mean of its divisors is an integer number (16725240).

Almost surely, 2^66900954 is an apocalyptic number.

66900954 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.

66900954 is a wasteful number, since it uses less digits than its factorization.

66900954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11150164.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 66900954 is about 8179.3003368259. The cubic root of 66900954 is about 405.9545719918.

The spelling of 66900954 in words is "sixty-six million, nine hundred thousand, nine hundred fifty-four".