42666515 has 12 divisors (see below), whose sum is σ = 54390576. Its totient is φ = 32124288.

The previous prime is 42666497. The next prime is 42666523. The reversal of 42666515 is 51566624.

It is not a de Polignac number, because 42666515 - 2⁶ = 42666451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13319 + ... + 16208.

It is an arithmetic number, because the mean of its divisors is an integer number (4532548).

Almost surely, 2^42666515 is an apocalyptic number.

42666515 is a deficient number, since it is larger than the sum of its proper divisors (11724061).

42666515 is a wasteful number, since it uses less digits than its factorization.

42666515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29566 (or 29549 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 42666515 is about 6531.9610378507. The cubic root of 42666515 is about 349.4317718533.

The spelling of 42666515 in words is "forty-two million, six hundred sixty-six thousand, five hundred fifteen".