72670855 has 4 divisors (see below), whose sum is σ = 87205032. Its totient is φ = 58136680.

The previous prime is 72670853. The next prime is 72670919. The reversal of 72670855 is 55807627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55807627 = 359 ⋅155453.

It is not a de Polignac number, because 72670855 - 2¹ = 72670853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72670853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7267081 + ... + 7267090.

It is an arithmetic number, because the mean of its divisors is an integer number (21801258).

Almost surely, 2^72670855 is an apocalyptic number.

72670855 is a deficient number, since it is larger than the sum of its proper divisors (14534177).

72670855 is a wasteful number, since it uses less digits than its factorization.

72670855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14534176.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 72670855 is about 8524.7202300134. The cubic root of 72670855 is about 417.3048414379.

The spelling of 72670855 in words is "seventy-two million, six hundred seventy thousand, eight hundred fifty-five".