66226957 has 4 divisors (see below), whose sum is σ = 66597120. Its totient is φ = 65856796.

The previous prime is 66226949. The next prime is 66226999. The reversal of 66226957 is 75962266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66226957 - 2³ = 66226949 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 (66206957) 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, 184813 + ... + 185170.

It is an arithmetic number, because the mean of its divisors is an integer number (16649280).

Almost surely, 2^66226957 is an apocalyptic number.

It is an amenable number.

66226957 is a deficient number, since it is larger than the sum of its proper divisors (370163).

66226957 is a wasteful number, since it uses less digits than its factorization.

66226957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370162.

The product of its digits is 272160, while the sum is 43.

The square root of 66226957 is about 8137.9946547046. The cubic root of 66226957 is about 404.5866982194.

The spelling of 66226957 in words is "sixty-six million, two hundred twenty-six thousand, nine hundred fifty-seven".