66715946 has 8 divisors (see below), whose sum is σ = 109171584. Its totient is φ = 30325420.

The previous prime is 66715907. The next prime is 66715951. The reversal of 66715946 is 64951766.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 66715897 and 66715906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516250 + ... + 1516293.

It is an arithmetic number, because the mean of its divisors is an integer number (13646448).

Almost surely, 2^66715946 is an apocalyptic number.

66715946 is a deficient number, since it is larger than the sum of its proper divisors (42455638).

66715946 is a wasteful number, since it uses less digits than its factorization.

66715946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032556.

The product of its digits is 272160, while the sum is 44.

The square root of 66715946 is about 8167.9829823525. The cubic root of 66715946 is about 405.5800173843.

The spelling of 66715946 in words is "sixty-six million, seven hundred fifteen thousand, nine hundred forty-six".