52666021 has 8 divisors (see below), whose sum is σ = 55067904. Its totient is φ = 50273520.

The previous prime is 52665989. The next prime is 52666027. The reversal of 52666021 is 12066625.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52666021 - 2⁵ = 52665989 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 (52666027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10756 + ... + 14866.

It is an arithmetic number, because the mean of its divisors is an integer number (6883488).

Almost surely, 2^52666021 is an apocalyptic number.

It is an amenable number.

52666021 is a deficient number, since it is larger than the sum of its proper divisors (2401883).

52666021 is a wasteful number, since it uses less digits than its factorization.

52666021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 52666021 is about 7257.1358675444. The cubic root of 52666021 is about 374.8379056483.

The spelling of 52666021 in words is "fifty-two million, six hundred sixty-six thousand, twenty-one".