72066667 has 8 divisors (see below), whose sum is σ = 74069424. Its totient is φ = 70078848.

The previous prime is 72066641. The next prime is 72066691. The reversal of 72066667 is 76666027.

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 72066667 - 2¹⁹ = 71542379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72006667) 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, 6423 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (9258678).

Almost surely, 2^72066667 is an apocalyptic number.

72066667 is a deficient number, since it is larger than the sum of its proper divisors (2002757).

72066667 is a wasteful number, since it uses less digits than its factorization.

72066667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7469.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 72066667 is about 8489.2088559535. The cubic root of 72066667 is about 416.1451258786.

The spelling of 72066667 in words is "seventy-two million, sixty-six thousand, six hundred sixty-seven".