66947036 has 24 divisors (see below), whose sum is σ = 127953504. Its totient is φ = 30461760.

The previous prime is 66947017. The next prime is 66947047. The reversal of 66947036 is 63074966.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66946984 and 66947002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5375 + ... + 12758.

It is an arithmetic number, because the mean of its divisors is an integer number (5331396).

Almost surely, 2^66947036 is an apocalyptic number.

It is an amenable number.

66947036 is a deficient number, since it is larger than the sum of its proper divisors (61006468).

66947036 is a wasteful number, since it uses less digits than its factorization.

66947036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18221 (or 18219 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 66947036 is about 8182.1168410137. The cubic root of 66947036 is about 406.0477590286.

The spelling of 66947036 in words is "sixty-six million, nine hundred forty-seven thousand, thirty-six".