66454079 has 4 divisors (see below), whose sum is σ = 66571440. Its totient is φ = 66336720.

The previous prime is 66454067. The next prime is 66454081. The reversal of 66454079 is 97045466.

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 66454079 - 2⁸ = 66453823 is a prime.

It is a super-2 number, since 2×66454079² = 8832289231476482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66454009) 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, 57827 + ... + 58964.

It is an arithmetic number, because the mean of its divisors is an integer number (16642860).

Almost surely, 2^66454079 is an apocalyptic number.

66454079 is a deficient number, since it is larger than the sum of its proper divisors (117361).

66454079 is a wasteful number, since it uses less digits than its factorization.

66454079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117360.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 66454079 is about 8151.9371317497. The cubic root of 66454079 is about 405.0486737213.

The spelling of 66454079 in words is "sixty-six million, four hundred fifty-four thousand, seventy-nine".