66292879 has 4 divisors (see below), whose sum is σ = 66659320. Its totient is φ = 65926440.

The previous prime is 66292873. The next prime is 66292883. The reversal of 66292879 is 97829266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97829266 = 2 ⋅48914633.

It is a cyclic number.

It is not a de Polignac number, because 66292879 - 2³ = 66292871 is a prime.

It is a super-2 number, since 2×66292879² = 8789491612217282, 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 (66292871) 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, 182949 + ... + 183310.

It is an arithmetic number, because the mean of its divisors is an integer number (16664830).

Almost surely, 2^66292879 is an apocalyptic number.

66292879 is a deficient number, since it is larger than the sum of its proper divisors (366441).

66292879 is a wasteful number, since it uses less digits than its factorization.

66292879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366440.

The product of its digits is 653184, while the sum is 49.

The square root of 66292879 is about 8142.0439080123. The cubic root of 66292879 is about 404.7208949320.

The spelling of 66292879 in words is "sixty-six million, two hundred ninety-two thousand, eight hundred seventy-nine".