42621766 has 12 divisors (see below), whose sum is σ = 70273476. Its totient is φ = 19373420.

The previous prime is 42621749. The next prime is 42621791. The reversal of 42621766 is 66712624.

It is a super-2 number, since 2×42621766² = 3633229873917512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87820 + ... + 88303.

It is an arithmetic number, because the mean of its divisors is an integer number (5856123).

Almost surely, 2^42621766 is an apocalyptic number.

42621766 is a deficient number, since it is larger than the sum of its proper divisors (27651710).

42621766 is a wasteful number, since it uses less digits than its factorization.

42621766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176147 (or 176136 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 42621766 is about 6528.5347513818. The cubic root of 42621766 is about 349.3095667924.

The spelling of 42621766 in words is "forty-two million, six hundred twenty-one thousand, seven hundred sixty-six".