61660837 has 16 divisors (see below), whose sum is σ = 72541312. Its totient is φ = 51321600.

The previous prime is 61660801. The next prime is 61660867. The reversal of 61660837 is 73806616.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61660837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61660796 and 61660805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660867) 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, 33337 + ... + 35137.

It is an arithmetic number, because the mean of its divisors is an integer number (4533832).

Almost surely, 2^61660837 is an apocalyptic number.

61660837 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61660837 is a deficient number, since it is larger than the sum of its proper divisors (10880475).

61660837 is a wasteful number, since it uses less digits than its factorization.

61660837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 61660837 is about 7852.4414674673. The cubic root of 61660837 is about 395.0661364450.

The spelling of 61660837 in words is "sixty-one million, six hundred sixty thousand, eight hundred thirty-seven".