67220051 has 4 divisors (see below), whose sum is σ = 68783352. Its totient is φ = 65656752.

The previous prime is 67220039. The next prime is 67220071. The reversal of 67220051 is 15002276.

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 67220051 - 2¹⁰ = 67219027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67219999 and 67220026.

It is not an unprimeable number, because it can be changed into a prime (67220071) 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, 781586 + ... + 781671.

It is an arithmetic number, because the mean of its divisors is an integer number (17195838).

Almost surely, 2^67220051 is an apocalyptic number.

67220051 is a deficient number, since it is larger than the sum of its proper divisors (1563301).

67220051 is a wasteful number, since it uses less digits than its factorization.

67220051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563300.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 67220051 is about 8198.7835073259. The cubic root of 67220051 is about 406.5989747433.

The spelling of 67220051 in words is "sixty-seven million, two hundred twenty thousand, fifty-one".