66920946 has 8 divisors (see below), whose sum is σ = 133841904. Its totient is φ = 22306980.

The previous prime is 66920941. The next prime is 66920963. The reversal of 66920946 is 64902966.

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

66920946 is an admirable number.

It is a super-3 number, since 3×66920946³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66920898 and 66920907.

It is not an unprimeable number, because it can be changed into a prime (66920941) 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, 5576740 + ... + 5576751.

It is an arithmetic number, because the mean of its divisors is an integer number (16730238).

Almost surely, 2^66920946 is an apocalyptic number.

66920946 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.

66920946 is a wasteful number, since it uses less digits than its factorization.

66920946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11153496.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 66920946 is about 8180.5223549600. The cubic root of 66920946 is about 405.9950050750.

The spelling of 66920946 in words is "sixty-six million, nine hundred twenty thousand, nine hundred forty-six".