72766670451 has 4 divisors (see below), whose sum is σ = 97022227272. Its totient is φ = 48511113632.

The previous prime is 72766670437. The next prime is 72766670467. The reversal of 72766670451 is 15407666727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15407666727 = 3 ⋅5135888909.

It is a cyclic number.

It is not a de Polignac number, because 72766670451 - 2⁶ = 72766670387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72766670394 and 72766670403.

It is not an unprimeable number, because it can be changed into a prime (72766670401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12127778406 + ... + 12127778411.

It is an arithmetic number, because the mean of its divisors is an integer number (24255556818).

Almost surely, 2^72766670451 is an apocalyptic number.

72766670451 is a deficient number, since it is larger than the sum of its proper divisors (24255556821).

72766670451 is a wasteful number, since it uses less digits than its factorization.

72766670451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24255556820.

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 72766670451 in words is "seventy-two billion, seven hundred sixty-six million, six hundred seventy thousand, four hundred fifty-one".