66212315 has 8 divisors (see below), whose sum is σ = 85566768. Its totient is φ = 48895200.

The previous prime is 66212299. The next prime is 66212347. The reversal of 66212315 is 51321266.

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

It is not a de Polignac number, because 66212315 - 2⁴ = 66212299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509261 + ... + 509390.

It is an arithmetic number, because the mean of its divisors is an integer number (10695846).

Almost surely, 2^66212315 is an apocalyptic number.

66212315 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66212315 is a deficient number, since it is larger than the sum of its proper divisors (19354453).

66212315 is a wasteful number, since it uses less digits than its factorization.

66212315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018669.

The product of its digits is 2160, while the sum is 26.

The square root of 66212315 is about 8137.0949976020. The cubic root of 66212315 is about 404.5568795708.

The spelling of 66212315 in words is "sixty-six million, two hundred twelve thousand, three hundred fifteen".