915008661 has 12 divisors (see below), whose sum is σ = 1510490592. Its totient is φ = 522862056.

The previous prime is 915008651. The next prime is 915008671. The reversal of 915008661 is 166800519.

915008661 is a `hidden beast` number, since 91 + 500 + 8 + 6 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (915008651) and next prime (915008671).

It is not a de Polignac number, because 915008661 - 2¹¹ = 915006613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (915008621) 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, 7261911 + ... + 7262036.

It is an arithmetic number, because the mean of its divisors is an integer number (125874216).

Almost surely, 2^915008661 is an apocalyptic number.

It is an amenable number.

915008661 is a deficient number, since it is larger than the sum of its proper divisors (595481931).

915008661 is a wasteful number, since it uses less digits than its factorization.

915008661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14523960 (or 14523957 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 915008661 is about 30249.1100860835. The cubic root of 915008661 is about 970.8267514782.

The spelling of 915008661 in words is "nine hundred fifteen million, eight thousand, six hundred sixty-one".