63972266 has 4 divisors (see below), whose sum is σ = 95958402. Its totient is φ = 31986132.

The previous prime is 63972263. The next prime is 63972277. The reversal of 63972266 is 66227936.

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., 40691641 + 23280625 = 6379^2 + 4825^2 .

It is not an unprimeable number, because it can be changed into a prime (63972263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15993065 + ... + 15993068.

Almost surely, 2^63972266 is an apocalyptic number.

63972266 is a deficient number, since it is larger than the sum of its proper divisors (31986136).

63972266 is a wasteful number, since it uses less digits than its factorization.

63972266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31986135.

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

The square root of 63972266 is about 7998.2664371725. The cubic root of 63972266 is about 399.9422124852.

The spelling of 63972266 in words is "sixty-three million, nine hundred seventy-two thousand, two hundred sixty-six".