72663274 has 4 divisors (see below), whose sum is σ = 108994914. Its totient is φ = 36331636.

The previous prime is 72663271. The next prime is 72663289. The reversal of 72663274 is 47236627.

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., 59954049 + 12709225 = 7743^2 + 3565^2 .

It is not an unprimeable number, because it can be changed into a prime (72663271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18165817 + ... + 18165820.

Almost surely, 2^72663274 is an apocalyptic number.

72663274 is a deficient number, since it is larger than the sum of its proper divisors (36331640).

72663274 is a wasteful number, since it uses less digits than its factorization.

72663274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36331639.

The product of its digits is 84672, while the sum is 37.

The square root of 72663274 is about 8524.2755703931. The cubic root of 72663274 is about 417.2903298980.

It can be divided in two parts, 726 and 63274, that added together give a cube (64000 = 40³).

The spelling of 72663274 in words is "seventy-two million, six hundred sixty-three thousand, two hundred seventy-four".