72651081 has 8 divisors (see below), whose sum is σ = 102566304. Its totient is φ = 45584960.

The previous prime is 72651077. The next prime is 72651101. The reversal of 72651081 is 18015627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72651081 - 2² = 72651077 is a prime.

It is a super-2 number, since 2×72651081² = 10556359140937122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72651001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712215 + ... + 712316.

It is an arithmetic number, because the mean of its divisors is an integer number (12820788).

Almost surely, 2^72651081 is an apocalyptic number.

It is an amenable number.

72651081 is a deficient number, since it is larger than the sum of its proper divisors (29915223).

72651081 is a wasteful number, since it uses less digits than its factorization.

72651081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424551.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 72651081 is about 8523.5603476482. The cubic root of 72651081 is about 417.2669879568.

The spelling of 72651081 in words is "seventy-two million, six hundred fifty-one thousand, eighty-one".