72657007 has 4 divisors (see below), whose sum is σ = 76481080. Its totient is φ = 68832936.

The previous prime is 72657001. The next prime is 72657029. The reversal of 72657007 is 70075627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72657007 - 2³ = 72656999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72657001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1912008 + ... + 1912045.

It is an arithmetic number, because the mean of its divisors is an integer number (19120270).

Almost surely, 2^72657007 is an apocalyptic number.

72657007 is a deficient number, since it is larger than the sum of its proper divisors (3824073).

72657007 is a wasteful number, since it uses less digits than its factorization.

72657007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824072.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 72657007 is about 8523.9079652469. The cubic root of 72657007 is about 417.2783328531.

The spelling of 72657007 in words is "seventy-two million, six hundred fifty-seven thousand, seven".