42766551 has 12 divisors (see below), whose sum is σ = 62787400. Its totient is φ = 28043280.

The previous prime is 42766523. The next prime is 42766589. The reversal of 42766551 is 15566724.

It is a happy number.

42766551 is a `hidden beast` number, since 42 + 7 + 66 + 551 = 666.

It is not a de Polignac number, because 42766551 - 2⁵ = 42766519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42766051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38401 + ... + 39498.

Almost surely, 2^42766551 is an apocalyptic number.

42766551 is a deficient number, since it is larger than the sum of its proper divisors (20020849).

42766551 is a wasteful number, since it uses less digits than its factorization.

42766551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77966 (or 77963 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 42766551 is about 6539.6139794333. The cubic root of 42766551 is about 349.7046515197.

It can be divided in two parts, 427665 and 51, that added together give a square (427716 = 654²).

The spelling of 42766551 in words is "forty-two million, seven hundred sixty-six thousand, five hundred fifty-one".