66735715 has 8 divisors (see below), whose sum is σ = 82666368. Its totient is φ = 51666240.

The previous prime is 66735703. The next prime is 66735737. The reversal of 66735715 is 51753766.

It is a happy number.

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

It is not a de Polignac number, because 66735715 - 2¹³ = 66727523 is a prime.

It is a super-2 number, since 2×66735715² = 8907311313122450, which contains 22 as substring.

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, 215122 + ... + 215431.

It is an arithmetic number, because the mean of its divisors is an integer number (10333296).

Almost surely, 2^66735715 is an apocalyptic number.

66735715 is a deficient number, since it is larger than the sum of its proper divisors (15930653).

66735715 is a wasteful number, since it uses less digits than its factorization.

66735715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430589.

The product of its digits is 132300, while the sum is 40.

The square root of 66735715 is about 8169.1930446036. The cubic root of 66735715 is about 405.6200733730.

The spelling of 66735715 in words is "sixty-six million, seven hundred thirty-five thousand, seven hundred fifteen".