66354137 has 4 divisors (see below), whose sum is σ = 69846480. Its totient is φ = 62861796.

The previous prime is 66354107. The next prime is 66354139. The reversal of 66354137 is 73145366.

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 66354137 - 2²² = 62159833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66354097 and 66354106.

It is not an unprimeable number, because it can be changed into a prime (66354139) 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, 1746143 + ... + 1746180.

It is an arithmetic number, because the mean of its divisors is an integer number (17461620).

Almost surely, 2^66354137 is an apocalyptic number.

It is an amenable number.

66354137 is a deficient number, since it is larger than the sum of its proper divisors (3492343).

66354137 is a wasteful number, since it uses less digits than its factorization.

66354137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492342.

The product of its digits is 45360, while the sum is 35.

The square root of 66354137 is about 8145.8048712205. The cubic root of 66354137 is about 404.8455174676.

The spelling of 66354137 in words is "sixty-six million, three hundred fifty-four thousand, one hundred thirty-seven".