66373091 has 4 divisors (see below), whose sum is σ = 66504000. Its totient is φ = 66242184.

The previous prime is 66373057. The next prime is 66373127. The reversal of 66373091 is 19037366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66373091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66373031) 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, 64691 + ... + 65708.

It is an arithmetic number, because the mean of its divisors is an integer number (16626000).

Almost surely, 2^66373091 is an apocalyptic number.

66373091 is a deficient number, since it is larger than the sum of its proper divisors (130909).

66373091 is a wasteful number, since it uses less digits than its factorization.

66373091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130908.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 66373091 is about 8146.9682090947. The cubic root of 66373091 is about 404.8840617181.

The spelling of 66373091 in words is "sixty-six million, three hundred seventy-three thousand, ninety-one".