7661259897 has 8 divisors (see below), whose sum is σ = 10215476160. Its totient is φ = 5107275120.

The previous prime is 7661259883. The next prime is 7661259919. The reversal of 7661259897 is 7989521667.

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

It is not a de Polignac number, because 7661259897 - 2¹² = 7661255801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7661259897.

It is not an unprimeable number, because it can be changed into a prime (7661252897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45979 + ... + 132047.

It is an arithmetic number, because the mean of its divisors is an integer number (1276934520).

Almost surely, 2^7661259897 is an apocalyptic number.

It is an amenable number.

7661259897 is a deficient number, since it is larger than the sum of its proper divisors (2554216263).

7661259897 is a wasteful number, since it uses less digits than its factorization.

7661259897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115743.

The product of its digits is 11430720, while the sum is 60.

The square root of 7661259897 is about 87528.6233011807. The cubic root of 7661259897 is about 1971.3635931092.

The spelling of 7661259897 in words is "seven billion, six hundred sixty-one million, two hundred fifty-nine thousand, eight hundred ninety-seven".