70640751 has 16 divisors (see below), whose sum is σ = 98956800. Its totient is φ = 44737440.

The previous prime is 70640749. The next prime is 70640753. The reversal of 70640751 is 15704607.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70640749) and next prime (70640753).

It is not a de Polignac number, because 70640751 - 2¹ = 70640749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70640753) 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, 6846 + ... + 13716.

It is an arithmetic number, because the mean of its divisors is an integer number (6184800).

Almost surely, 2^70640751 is an apocalyptic number.

70640751 is a deficient number, since it is larger than the sum of its proper divisors (28316049).

70640751 is a wasteful number, since it uses less digits than its factorization.

70640751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7046.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 70640751 is about 8404.8052327225. The cubic root of 70640751 is about 413.3821971512.

The spelling of 70640751 in words is "seventy million, six hundred forty thousand, seven hundred fifty-one".