60605991 has 12 divisors (see below), whose sum is σ = 92149720. Its totient is φ = 38277360.

The previous prime is 60605981. The next prime is 60606017. The reversal of 60605991 is 19950606.

60605991 is a `hidden beast` number, since 6 + 0 + 60 + 599 + 1 = 666.

It is not a de Polignac number, because 60605991 - 2¹⁰ = 60604967 is a prime.

It is a super-2 number, since 2×60605991² = 7346172290184162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60605981) 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, 177040 + ... + 177381.

Almost surely, 2^60605991 is an apocalyptic number.

60605991 is a deficient number, since it is larger than the sum of its proper divisors (31543729).

60605991 is a wasteful number, since it uses less digits than its factorization.

60605991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354446 (or 354443 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 60605991 is about 7784.9849710838. The cubic root of 60605991 is about 392.8003375591.

The spelling of 60605991 in words is "sixty million, six hundred five thousand, nine hundred ninety-one".