71966546 has 4 divisors (see below), whose sum is σ = 107949822. Its totient is φ = 35983272.

The previous prime is 71966507. The next prime is 71966549. The reversal of 71966546 is 64566917.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 22193521 = 7055^2 + 4711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71966497 and 71966506.

It is not an unprimeable number, because it can be changed into a prime (71966549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17991635 + ... + 17991638.

Almost surely, 2^71966546 is an apocalyptic number.

71966546 is a deficient number, since it is larger than the sum of its proper divisors (35983276).

71966546 is a wasteful number, since it uses less digits than its factorization.

71966546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35983275.

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

The square root of 71966546 is about 8483.3098493454. The cubic root of 71966546 is about 415.9523221061.

The spelling of 71966546 in words is "seventy-one million, nine hundred sixty-six thousand, five hundred forty-six".