88891665 has 16 divisors (see below), whose sum is σ = 148411008. Its totient is φ = 45347456.

The previous prime is 88891661. The next prime is 88891667. The reversal of 88891665 is 56619888.

It is a cyclic number.

It is not a de Polignac number, because 88891665 - 2² = 88891661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88891661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128484 + ... + 129173.

It is an arithmetic number, because the mean of its divisors is an integer number (9275688).

Almost surely, 2^88891665 is an apocalyptic number.

It is an amenable number.

88891665 is a deficient number, since it is larger than the sum of its proper divisors (59519343).

88891665 is a wasteful number, since it uses less digits than its factorization.

88891665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257688.

The product of its digits is 829440, while the sum is 51.

The square root of 88891665 is about 9428.2376401955. The cubic root of 88891665 is about 446.2932793904.

The spelling of 88891665 in words is "eighty-eight million, eight hundred ninety-one thousand, six hundred sixty-five".