7661255427 has 32 divisors (see below), whose sum is σ = 13049164800. Its totient is φ = 4351627584.

The previous prime is 7661255387. The next prime is 7661255461. The reversal of 7661255427 is 7245521667.

7661255427 is a `hidden beast` number, since 7 + 6 + 612 + 5 + 5 + 4 + 27 = 666.

It is not a de Polignac number, because 7661255427 - 2⁶ = 7661255363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7661255477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89802 + ... + 152927.

It is an arithmetic number, because the mean of its divisors is an integer number (407786400).

Almost surely, 2^7661255427 is an apocalyptic number.

7661255427 is a deficient number, since it is larger than the sum of its proper divisors (5387909373).

7661255427 is a wasteful number, since it uses less digits than its factorization.

7661255427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242912 (or 242906 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 7661255427 is about 87528.5977666728. The cubic root of 7661255427 is about 1971.3632097085.

The spelling of 7661255427 in words is "seven billion, six hundred sixty-one million, two hundred fifty-five thousand, four hundred twenty-seven".